AI-generatedWaterloo, Ontario at a glance
- Best time
- May – Sep
- Warmest month
- Jul · 27°
- Sunshine a year
- 1,990 h
- Rain a year
- 907 mm
- Climate
- Continental
- Time zone
- UTC−5 / UTC−4
- Elevation
- 325 m
Climate in Waterloo, Ontario
Waterloo, Ontario has mild to warm summers and cold winters with occasional snow. July is the warmest month with average highs of 27 °C, while January is the coolest at −2 °C. With around 1,990 hours of sunshine a year, Waterloo, Ontario is moderately sunny; July is the sunniest month with 8.5 hours a day.
Holiday weather through the year
Best time to visit Waterloo, Ontario
The best time to visit Waterloo, Ontario is from May to September. For sightseeing, day trips and hiking, conditions are most comfortable from May to September. Rain is frequent in December; the wettest month is June with 96 mm.
Waterloo, Ontario through the seasons
How the weather changes over the seasons, with averages for each.
Waterloo, Ontario in spring
Mar – May
Fair
- 5–20 °C by day
- 6.3 h of sun a day
- 34 rainy days in all
Waterloo, Ontario in summer
Jun – Aug
Excellent
- 25–27 °C by day
- 7.9 h of sun a day
- 33 rainy days in all
Waterloo, Ontario in autumn
Sep – Nov
Fair
- 7–22 °C by day
- 4.5 h of sun a day
- 32 rainy days in all
Waterloo, Ontario in winter
Dec – Feb
Poor
- −1–1 °C by day
- 3.0 h of sun a day
- 34 rainy days in all
Which month for what?
Beach & swimming
No sea nearby
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
May – Sep
15–28 °C and not too much rain
Rainy months
Dec
Rainy season or more than 12 rainy days
Snow
Nov – Apr
Snow on 2 or more days
Find your perfect month
Tell us what you like and we rate every month in Waterloo, Ontario for you.
Your best months: June, August – September
Based on the climate averages; tap a month to see its details.
Weather in October
Weather in October
Holiday weather in October
Fair
Best time to visit: May – September
A typical day in October
- Morning, 08:00: about 6°
- Midday, 13:00: about 14°
- Afternoon, 16:00: about 14°
- Evening, 20:00: about 10°
- Night, 23:00: about 8°
07:3418:41
Cold evenings: bring a warm jacket.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
Light for photos in October
- Golden hour
- Morning 07:17–08:13 · evening 18:02–18:59
- Blue hour
- Morning 07:06–07:17 · evening 18:59–19:10
Golden hour: the sun between 4° below and 6° above the horizon; blue hour: 6° to 4° below it. Times for the 15th of the month; mountains and clouds shift the light.
October in Waterloo, Ontario compared with home
Loading the climate at home …
Early or late October?
In October, daytime highs fall from about 18° at the start of the month to 11° at the end. The days get 1.4 h shorter.
| October | 1 Oct | 31 Oct |
|---|---|---|
| Daytime high | 18° | 11° |
| Night-time low | 8° | 2° |
| Daylight | 11.8 h | 10.4 h |
What is the weather like in Waterloo, Ontario in October?
In October, Waterloo, Ontario is cool: daytime highs average 15 °C, and nights cool down to about 5 °C. Expect around 4.2 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 77 mm in total. All in all, October is a so-so month for a holiday in Waterloo, Ontario.
More details for October
- Daylight
- 11 h 6 min07:34 – 18:41
- UV index
- 3 · moderateclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 19 km/haverage daily peakAll months
- Cloud cover
- 63 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snowAll months
- Time zone
- UTC−4offset from UTC
How the score comes together
- Temperatureweight 50 %65 %
- Sunshineweight 20 %20 %
- Few rainy daysweight 30 %47 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in October
- Sunscreen
- A jumper for the evenings
- Rain jacket or umbrella
Compare two months in Waterloo, Ontario
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
July has the better holiday weather in Waterloo, Ontario: score 84 against 51. In July, days are 12 °C warmer than in October. The sun shines 4 hours longer a day in July.
| Month | October | July |
|---|---|---|
| Holiday weather score | 51 | 84better |
| Daytime high | 15° | 27° |
| Night-time low | 5° | 15° |
| Sunshine | 4.2 h | 8.5 hbetter |
| Rainy days | 11 | 11 |
| Rainfall | 77 mm | 82 mm |
| Muggy days | 0better | 6 |
Based on the climate averages 1996–2025.
Waterloo, Ontario month by month
The typical weather for every month at a glance.
14January−1° · 2.8 h
In January, Waterloo, Ontario is bitterly cold: daytime highs average −2 °C, and nights often drop below freezing (−10 °C). The sun is scarce, with only about 2.8 hours a day. Precipitation falls on about 12 days, totalling 66 mm; on about 8 of them it snows. All in all, January is not an ideal month for a holiday in Waterloo, Ontario.
Waterloo, Ontario in January21February0° · 4.1 h
In February, Waterloo, Ontario is bitterly cold: daytime highs average 0 °C, and nights often drop below freezing (−10 °C). Expect around 4.1 hours of sunshine a day. Precipitation falls on about 10 days, totalling 61 mm; on about 7 of them it snows. All in all, February is not an ideal month for a holiday in Waterloo, Ontario.
Waterloo, Ontario in February25March5° · 5.3 h
In March, Waterloo, Ontario is cold: daytime highs average 5 °C, and nights often drop below freezing (−5 °C). Expect around 5.3 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 65 mm in total. Snow falls on about 4 days. All in all, March is not an ideal month for a holiday in Waterloo, Ontario.
Waterloo, Ontario in March48April13° · 6.3 h
In April, Waterloo, Ontario is cool: daytime highs average 13 °C, and nights cool down to about 1 °C. Expect around 6.3 hours of sunshine a day. Rain is frequent, with about 12 rainy days and 85 mm in total. Snow falls on about 2 days. All in all, April is a so-so month for a holiday in Waterloo, Ontario.
Waterloo, Ontario in April78May20° · 7.4 h
In May, Waterloo, Ontario is mild: daytime highs average 20 °C, and nights cool down to about 8 °C. The sun shines for around 7.4 hours a day. Rain is frequent, with about 12 rainy days and 87 mm in total. All in all, May is a good month for a holiday in Waterloo, Ontario.
Waterloo, Ontario in May80June25° · 8.0 h
In June, Waterloo, Ontario is warm: daytime highs average 25 °C, and nights cool down to about 13 °C. The sun shines for around 8.0 hours a day. Rain is frequent, with about 12 rainy days and 96 mm in total. All in all, June is an excellent month for a holiday in Waterloo, Ontario.
Waterloo, Ontario in June84July27° · 8.5 h
In July, Waterloo, Ontario is warm: daytime highs average 27 °C, and nights cool down to about 15 °C. The sun shines for around 8.5 hours a day. Rain is frequent, with about 11 rainy days and 82 mm in total. On about 5 days the thermometer climbs to 30 °C or more. All in all, July is an excellent month for a holiday in Waterloo, Ontario.
Waterloo, Ontario in July81August26° · 7.2 h
In August, Waterloo, Ontario is warm: daytime highs average 26 °C, and nights cool down to about 14 °C. The sun shines for around 7.2 hours a day. Rain is frequent, with about 10 rainy days and 72 mm in total. All in all, August is an excellent month for a holiday in Waterloo, Ontario.
Waterloo, Ontario in August79September22° · 6.0 h
In September, Waterloo, Ontario is warm: daytime highs average 22 °C, and nights cool down to about 11 °C. Expect around 6.0 hours of sunshine a day. Rain is frequent, with about 9 rainy days and 77 mm in total. All in all, September is a good month for a holiday in Waterloo, Ontario.
Waterloo, Ontario in September51October15° · 4.2 h
In October, Waterloo, Ontario is cool: daytime highs average 15 °C, and nights cool down to about 5 °C. Expect around 4.2 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 77 mm in total. All in all, October is a so-so month for a holiday in Waterloo, Ontario.
Waterloo, Ontario in October17November7° · 3.4 h
In November, Waterloo, Ontario is cold: daytime highs average 7 °C, and nights often drop below freezing (−1 °C). The sun is scarce, with only about 3.4 hours a day. Rain is frequent, with about 11 rainy days and 68 mm in total. Snow falls on about 3 days. All in all, November is not an ideal month for a holiday in Waterloo, Ontario.
Waterloo, Ontario in November12December1° · 2.2 h
In December, Waterloo, Ontario is bitterly cold: daytime highs average 1 °C, and nights often drop below freezing (−6 °C). The sun is scarce, with only about 2.2 hours a day. Precipitation falls on about 12 days, totalling 71 mm; on about 7 of them it snows. All in all, December is not an ideal month for a holiday in Waterloo, Ontario.
Waterloo, Ontario in DecemberClimate in detail
Year & climate table
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Waterloo, Ontario
How warm the nights get in each month, from the mean night-time low. Tap a month for details.
- Frost below 0°
- Cold 0–8°
- Cool 8–15°
- Pleasant 15–20°
ColdOctober: nights around 5°. The room should be heated.
The coolest nights are in January (−10°), the warmest in July (15°). Nights are pleasant for sleeping (15 to 20 °C) in July. Nights fall below 8 °C on average from October to April, so the room should be heated.
Temperatures through the year
Average daytime high, night-time low and sea temperature per month.
| Month | Score | Day | Night | Sun | Rain days | Rain mm |
|---|---|---|---|---|---|---|
| JanuaryJan | 14 | −2° | −10° | 2.8 h | 12 | 66 |
| FebruaryFeb | 21 | 0° | −10° | 4.1 h | 10 | 61 |
| MarchMar | 25 | 5° | −5° | 5.3 h | 10 | 65 |
| AprilApr | 48 | 13° | 1° | 6.3 h | 12 | 85 |
| MayMay | 78 | 20° | 8° | 7.4 h | 12 | 87 |
| JuneJun | 80 | 25° | 13° | 8.0 h | 12 | 96 |
| JulyJul | 84 | 27° | 15° | 8.5 h | 11 | 82 |
| AugustAug | 81 | 26° | 14° | 7.2 h | 10 | 72 |
| SeptemberSep | 79 | 22° | 11° | 6.0 h | 9 | 77 |
| OctoberOct | 51 | 15° | 5° | 4.2 h | 11 | 77 |
| NovemberNov | 17 | 7° | −1° | 3.4 h | 11 | 68 |
| DecemberDec | 12 | 1° | −6° | 2.2 h | 12 | 71 |
Climate averages 1996–2025 (sunshine partly WMO station normals 1991–2020), not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences
43.47° N, 80.52° W · 325 m · America/Toronto
Sunshine
Sunshine hours in Waterloo, Ontario
Average hours of bright sunshine per day, next to the length of the day. Tap a month to select it.
In October, the sun shines for about 4.2 of 11.1 hours of daylight in Waterloo, Ontario, 38 % of the daylight hours.
Sunshine hours: estimated from radiation data (ERA5, 1996–2025) and calibrated against measured station values; no weather station is close enough here. Daylight is the time from sunrise to sunset on the 15th of the month.
Rain
Rain in Waterloo, Ontario: rainy days and rainfall
A rainy day is a day with at least 1 mm of rain or snow; the amount is what falls in the whole month. Tap a month to select it.
In October, Waterloo, Ontario has about 11 rainy days with 77 mm of rain in total.
UV index
UV index in Waterloo, Ontario
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 3 · moderateAround midday seek shade; use sunscreen, a hat and sunglasses.
The sun is strongest in June (UV 9).
Minutes until sunburn in October
- Very fair skin
- about 40 min
- Fair skin
- about 50 min
- Light brown skin
- about 70 min
- Olive skin
- about 90 min
Rough guide for unprotected skin at noon under a clear sky; clouds lengthen the time, water, sand and snow shorten it. Sunscreen extends the time only partly.
Monthly values: clear-sky noon estimate from the sun's angle, ozone and altitude. UV today: Open-Meteo forecast.
Wind & clouds
Wind and clouds in Waterloo, Ontario
How breezy and how cloudy Waterloo, Ontario is through the year. Tap a month to select it on the whole page.
Wind
Typical daily peak of the wind in km/h: what the afternoon breeze usually reaches, not the gusts.
In October, the wind in Waterloo, Ontario typically peaks at 19 km/h during the day: Beaufort 3, gentle breeze.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 63 % of the sky over Waterloo, Ontario: variable cloud, with about 4.2 hours of sunshine a day.
Wind: mean daily maximum of the hourly wind 10 m above ground (ERA5, 1996–2025). Gusts are stronger, and the model grid of about 28 km smooths out local effects such as capes and valley winds. Clouds: mean total cloud cover of all layers over day and night (ERA5, 1996–2025). Thin high cloud counts as cover even when the sun still shines through.
Heat & humidity
Heat and humidity in Waterloo, Ontario
How often the day gets hot in Waterloo, Ontario (30 °C and more), and in which months heat and humidity come together. Tap a month to select it.
Heat calendar
- pleasant
- some hot or muggy days
- often muggy
- often hot
- hot and muggy
In October, Waterloo, Ontario has about 0 hot days, with an average daytime high of 15 °C: pleasant. Heat plays no part this month.
Hot days reach at least 30 °C; a month counts as muggy when the mean dew point reaches 18 °C on at least 15 days. Averages from ERA5 and ERA5-Land, 1996–2025. Muggy nights through the year
Snow
Snow in Waterloo, Ontario
When Waterloo, Ontario is likely to be white: the chance of seeing snow during a week's stay, the days with fresh snow and how much falls. Tap a month to select it.
Snow calendar
- hardly any
- possible
- likely
- very likely
In October, it hardly ever snows in Waterloo, Ontario.
Snow days bring at least 1 cm of fresh snow. Fresh snow comes from ERA5 snowfall (1996–2025) at the height of the place, not on the slopes above it; the snow chance also weighs whether the snow settles. An estimate from climate averages, not a snow report.
Planning a trip to Waterloo, Ontario
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Waterloo, Ontario in the school holidays
How the weather suits the usual holiday periods. Dates vary by school and region, so each holiday uses the months it usually falls in.
Waterloo, Ontario has its best school-holiday weather during the summer holidays (score 82) and its weakest during the Christmas holidays (score 13).
- 41
Easter holidays
Mar – Apr
Fair
- 10 °C by day
- 6.0 h of sun a day
- 11 rainy days a month
Keep in mind: Snow
- 78
May half-term
May – Jun
Good
- 21 °C by day
- 7.5 h of sun a day
- 12 rainy days a month
Good for: Sightseeing & walks
- 82
Summer holidays
Jul – Aug
ExcellentBest holidays
- 26 °C by day
- 7.7 h of sun a day
- 10 rainy days a month
Good for: Sightseeing & walks
- 51
October half-term
Oct
Fair
- 15 °C by day
- 4.2 h of sun a day
- 11 rainy days a month
- 13
Christmas holidays
Dec – Jan
Poor
- 0 °C by day
- 2.5 h of sun a day
- 12 rainy days a month
Keep in mind: Frequent rain, Snow
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- about 7 h 30 min
- Distance
- 5,780 km
- Time zone
- UTC−4
- Jet lag
- About 3 days (5 h west)
Rule of thumb for flying west: for a few days before, stay up a little later, and get afternoon and evening light at your destination.
Estimated from the straight-line distance: 30 minutes for take-off and landing plus 830 km/h cruising speed.
Good to know: Canada
- Currency
- Canadian Dollar (CAD)
- Languages
- English, French
- Sockets
- Type A, B · 120 V
- Traffic
- Drives on the right
- Dialling code
- +1
- Emergency number
- 911
UK plugs need a travel adapter
Only 120 V: chargers marked 100–240 V work, other devices need a voltage converter.
Sources: GeoNames (CC BY 4.0) and Wikidata (CC0). Please check details before you travel.
Compare & alternatives
Compare with another place
Waterloo, Ontario compared
Put Waterloo, Ontario side by side with another destination.
Waterloo vs Cambridge
In October the holiday weather in Waterloo and Cambridge is about equally good (score 51 vs 54). During the day it is about as warm in Cambridge as in Waterloo.
| in October | Waterloo | Cambridge |
|---|---|---|
| Holiday weather score | 51 | 54 |
| Daytime high | 15° | 15° |
| Sunshine | 4 h | 4 h |
| Rainy days | 11 | 11 |
| Best time | May – Sep | May – Sep |
Through the year
Best places in the country
Canada in October: the best places
In October, Waterloo, Ontario ranks 19 among the 31 nearest destinations in this country.
- Sarnia16°61
- 2Brantford16°58
- 3Hamilton15°57
- 4St. Catharines16°57
- 5Burlington15°55
- 6Oakville15°55
- 7St. Thomas15°55
- 8Niagara Falls16°55
- 19WaterlooThis page15°51
Places nearby
Near Waterloo, Ontario
Other destinations close by.
Places with a similar climate
Places with a climate like Waterloo, Ontario
Destinations whose weather through the year is closest to Waterloo, Ontario's – good alternatives.
Frequently asked questions about Waterloo, Ontario
When is the best time to visit Waterloo, Ontario?
The best time to visit Waterloo, Ontario is from May to September. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
What is the warmest month in Waterloo, Ontario?
July is the warmest month, with average highs of 27 °C and nights around 15 °C. January is the coolest month at −2 °C.
When does it rain most in Waterloo, Ontario?
Rain is frequent in December; the wettest month is June with 96 mm. The driest month is February with 61 mm.
How many hours of sunshine does Waterloo, Ontario get?
Waterloo, Ontario gets around 1,990 hours of sunshine a year. The sunniest month is July with 8.5 hours a day; in December there are 2.2 hours a day.
What time zone is Waterloo, Ontario in?
Waterloo, Ontario is on UTC−5 in January and UTC−4 in July.
How long is the flight from London to Waterloo, Ontario?
A nonstop flight from London to Waterloo, Ontario takes about 7 h 30 min, for a straight-line distance of about 5,780 km.
Which school holidays are best for Waterloo, Ontario?
Waterloo, Ontario has its best school-holiday weather during the summer holidays (score 82) and its weakest during the Christmas holidays (score 13). Holiday ratings (0–100): Easter holidays 41, May half-term 78, summer holidays 82, October half-term 51, Christmas holidays 13.