AI-generatedSt. Catharines at a glance
- Best time
- May – Sep
- Warmest month
- Jul · 28°
- Sunshine a year
- 2,060 h
- Rain a year
- 976 mm
- Climate
- Continental
- Time zone
- UTC−5 / UTC−4
- Elevation
- 102 m
Climate in St. Catharines
St. Catharines has warm to hot summers and cold winters with occasional snow. July is the warmest month with average highs of 28 °C, while January is the coolest at 1 °C. With around 2,060 hours of sunshine a year, St. Catharines is moderately sunny; July is the sunniest month with 8.8 hours a day.
Holiday weather through the year
Best time to visit St. Catharines
The best time to visit St. Catharines is from May to September. For sightseeing, day trips and hiking, conditions are most comfortable from May to October. Rain is frequent in April and in December; the wettest month is April with 99 mm.
St. Catharines through the seasons
How the weather changes over the seasons, with averages for each.
St. Catharines in spring
Mar – May
Fair
- 6–19 °C by day
- 6.5 h of sun a day
- 34 rainy days in all
St. Catharines in summer
Jun – Aug
Excellent
- 25–28 °C by day
- 8.2 h of sun a day
- 33 rainy days in all
St. Catharines in autumn
Sep – Nov
Fair
- 9–23 °C by day
- 4.7 h of sun a day
- 32 rainy days in all
St. Catharines in winter
Dec – Feb
Poor
- 1–4 °C by day
- 3.1 h of sun a day
- 33 rainy days in all
Which month for what?
Beach & swimming
No sea nearby
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
May – Oct
15–28 °C and not too much rain
Rainy months
Apr, Dec
Rainy season or more than 12 rainy days
Snow
Dec – Mar
Snow on 2 or more days
Find your perfect month
Tell us what you like and we rate every month in St. Catharines for you.
Your best months: June, 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
Good forSightseeing & walks
A typical day in October
- Morning, 08:00: about 9°
- Midday, 13:00: about 15°
- Afternoon, 16:00: about 16°
- Evening, 20:00: about 13°
- Night, 23:00: about 11°
07:2918:36
Cool evenings: pack a jumper or a jacket.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
Light for photos in October
- Golden hour
- Morning 07:11–08:08 · evening 17:57–18:54
- Blue hour
- Morning 07:00–07:11 · evening 18:54–19:05
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 St. Catharines compared with home
Loading the climate at home …
Early or late October?
In October, daytime highs fall from about 19° at the start of the month to 12° at the end. The days get 1.4 h shorter.
| October | 1 Oct | 31 Oct |
|---|---|---|
| Daytime high | 19° | 12° |
| Night-time low | 11° | 6° |
| Daylight | 11.8 h | 10.4 h |
What is the weather like in St. Catharines in October?
In October, St. Catharines is cool: daytime highs average 16 °C, and nights cool down to about 8 °C. Expect around 4.4 hours of sunshine a day. Rain is frequent, with about 12 rainy days and 90 mm in total. All in all, October is a so-so month for a holiday in St. Catharines.
More details for October
- Daylight
- 11 h 7 min07:29 – 18:36
- UV index
- 3 · moderateclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 24 km/haverage daily peakAll months
- Cloud cover
- 61 %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 %78 %
- Sunshineweight 20 %23 %
- Few rainy daysweight 30 %43 %
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 St. Catharines
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
June has the better holiday weather in St. Catharines: score 82 against 57. In June, days are 9 °C warmer than in October. June has one rainy day fewer. The sun shines 4 hours longer a day in June.
| Month | October | June |
|---|---|---|
| Holiday weather score | 57 | 82better |
| Daytime high | 16° | 25° |
| Night-time low | 8° | 16° |
| Sunshine | 4.4 h | 8.3 hbetter |
| Rainy days | 12 | 11better |
| Rainfall | 90 mm | 91 mm |
| Muggy days | 0better | 6 |
Based on the climate averages 1996–2025.
St. Catharines month by month
The typical weather for every month at a glance.
14January1° · 2.8 h
In January, St. Catharines is bitterly cold: daytime highs average 1 °C, and nights often drop below freezing (−5 °C). The sun is scarce, with only about 2.8 hours a day. Precipitation falls on about 12 days, totalling 73 mm; on about 7 of them it snows. All in all, January is not an ideal month for a holiday in St. Catharines.
St. Catharines in January22February1° · 4.1 h
In February, St. Catharines is bitterly cold: daytime highs average 1 °C, and nights often drop below freezing (−5 °C). Expect around 4.1 hours of sunshine a day. Precipitation falls on about 9 days, totalling 66 mm; on about 6 of them it snows. All in all, February is not an ideal month for a holiday in St. Catharines.
St. Catharines in February24March6° · 5.3 h
In March, St. Catharines is cold: daytime highs average 6 °C, and nights often drop below freezing (−2 °C). Expect around 5.3 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 74 mm in total. Snow falls on about 4 days. All in all, March is not an ideal month for a holiday in St. Catharines.
St. Catharines in March47April13° · 6.5 h
In April, St. Catharines is cool: daytime highs average 13 °C, and nights cool down to about 4 °C. The sun shines for around 6.5 hours a day. Rain is frequent, with about 12 rainy days and 99 mm in total. All in all, April is a so-so month for a holiday in St. Catharines.
St. Catharines in April80May19° · 7.7 h
In May, St. Catharines is mild: daytime highs average 19 °C, and nights cool down to about 10 °C. The sun shines for around 7.7 hours a day. Rain is frequent, with about 11 rainy days and 82 mm in total. All in all, May is an excellent month for a holiday in St. Catharines.
St. Catharines in May82June25° · 8.3 h
In June, St. Catharines is warm: daytime highs average 25 °C, and nights cool down to about 16 °C. The sun shines for around 8.3 hours a day. Rain is frequent, with about 11 rainy days and 91 mm in total. All in all, June is an excellent month for a holiday in St. Catharines.
St. Catharines in June81July28° · 8.8 h
In July, St. Catharines is hot: daytime highs average 28 °C, and nights cool down to about 19 °C. The sun shines for around 8.8 hours a day. Rain is frequent, with about 11 rainy days and 90 mm in total. On about 6 days the thermometer climbs to 30 °C or more. All in all, July is an excellent month for a holiday in St. Catharines.
St. Catharines in July82August27° · 7.6 h
In August, St. Catharines is warm: daytime highs average 27 °C, and nights cool down to about 18 °C. The sun shines for around 7.6 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 St. Catharines.
St. Catharines in August79September23° · 6.3 h
In September, St. Catharines is warm: daytime highs average 23 °C, and nights cool down to about 14 °C. Expect around 6.3 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 81 mm in total. All in all, September is a good month for a holiday in St. Catharines.
St. Catharines in September57October16° · 4.4 h
In October, St. Catharines is cool: daytime highs average 16 °C, and nights cool down to about 8 °C. Expect around 4.4 hours of sunshine a day. Rain is frequent, with about 12 rainy days and 90 mm in total. All in all, October is a so-so month for a holiday in St. Catharines.
St. Catharines in October23November9° · 3.4 h
In November, St. Catharines is cold: daytime highs average 9 °C, and nights cool down to about 3 °C. The sun is scarce, with only about 3.4 hours a day. Rain is frequent, with about 11 rainy days and 76 mm in total. Snow falls on about 2 days. All in all, November is not an ideal month for a holiday in St. Catharines.
St. Catharines in November12December4° · 2.4 h
In December, St. Catharines is cold: daytime highs average 4 °C, and nights often drop below freezing (−2 °C). The sun is scarce, with only about 2.4 hours a day. Precipitation falls on about 12 days, totalling 82 mm; on about 5 of them it snows. All in all, December is not an ideal month for a holiday in St. Catharines.
St. Catharines 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 St. Catharines
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°
CoolOctober: nights around 8°. A duvet at night and a jumper for the evening.
The coolest nights are in January (−5°), the warmest in July (19°). Nights are pleasant for sleeping (15 to 20 °C) from June to August. Nights fall below 8 °C on average from November 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 | 1° | −5° | 2.8 h | 12 | 73 |
| FebruaryFeb | 22 | 1° | −5° | 4.1 h | 9 | 66 |
| MarchMar | 24 | 6° | −2° | 5.3 h | 11 | 74 |
| AprilApr | 47 | 13° | 4° | 6.5 h | 12 | 99 |
| MayMay | 80 | 19° | 10° | 7.7 h | 11 | 82 |
| JuneJun | 82 | 25° | 16° | 8.3 h | 11 | 91 |
| JulyJul | 81 | 28° | 19° | 8.8 h | 11 | 90 |
| AugustAug | 82 | 27° | 18° | 7.6 h | 10 | 72 |
| SeptemberSep | 79 | 23° | 14° | 6.3 h | 10 | 81 |
| OctoberOct | 57 | 16° | 8° | 4.4 h | 12 | 90 |
| NovemberNov | 23 | 9° | 3° | 3.4 h | 11 | 76 |
| DecemberDec | 12 | 4° | −2° | 2.4 h | 12 | 82 |
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
43.17° N, 79.24° W · 102 m · America/Toronto
Sunshine
Sunshine hours in St. Catharines
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 4.4 of 11.1 hours of daylight in St. Catharines, 40 % 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 St. Catharines: 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, St. Catharines has about 12 rainy days with 90 mm of rain in total.
UV index
UV index in St. Catharines
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 St. Catharines
How breezy and how cloudy St. Catharines 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 St. Catharines typically peaks at 24 km/h during the day: Beaufort 4, moderate breeze.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 61 % of the sky over St. Catharines: variable cloud, with about 4.4 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 St. Catharines
How often the day gets hot in St. Catharines (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, St. Catharines has about 0 hot days, with an average daytime high of 16 °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 St. Catharines
When St. Catharines 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 St. Catharines.
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 St. Catharines
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
St. Catharines 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.
St. Catharines has its best school-holiday weather during the summer holidays (score 82) and its weakest during the Christmas holidays (score 13).
- 40
Easter holidays
Mar – Apr
Fair
- 11 °C by day
- 6.1 h of sun a day
- 12 rainy days a month
Keep in mind: Frequent rain, Snow
- 80
May half-term
May – Jun
Excellent
- 20 °C by day
- 7.8 h of sun a day
- 11 rainy days a month
Good for: Sightseeing & walks
- 82
Summer holidays
Jul – Aug
ExcellentBest holidays
- 27 °C by day
- 8.0 h of sun a day
- 10 rainy days a month
Good for: Sightseeing & walks
- 57
October half-term
Oct
Fair
- 16 °C by day
- 4.4 h of sun a day
- 12 rainy days a month
Good for: Sightseeing & walks
- 13
Christmas holidays
Dec – Jan
Poor
- 2 °C by day
- 2.6 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 25 min
- Distance
- 5,720 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
St. Catharines compared
Put St. Catharines side by side with another destination.
St. Catharines vs Niagara Falls
In October the holiday weather in St. Catharines and Niagara Falls is about equally good (score 57 vs 55). During the day it is about as warm in Niagara Falls as in St. Catharines.
| in October | St. Catharines | Niagara Falls |
|---|---|---|
| Holiday weather score | 57 | 55 |
| Daytime high | 16° | 16° |
| Sunshine | 4 h | 4 h |
| Rainy days | 12 | 13 |
| Best time | May – Sep | May – Sep |
Through the year
Best places in the country
Canada in October: the best places
In October, St. Catharines ranks 2 among the 31 nearest destinations in this country.
- Brantford16°58
- 2St. CatharinesThis page16°57
- 3Hamilton15°57
- 4Cobourg15°57
- 5Niagara Falls16°55
- 6Oakville15°55
- 7Burlington15°55
- 8Port Hope15°55
Places nearby
Near St. Catharines
Other destinations close by.
Places with a similar climate
Places with a climate like St. Catharines
Destinations whose weather through the year is closest to St. Catharines's – good alternatives.
Frequently asked questions about St. Catharines
When is the best time to visit St. Catharines?
The best time to visit St. Catharines 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 St. Catharines?
July is the warmest month, with average highs of 28 °C and nights around 19 °C. January is the coolest month at 1 °C.
When does it rain most in St. Catharines?
Rain is frequent in April and in December; the wettest month is April with 99 mm. The driest month is February with 66 mm.
How many hours of sunshine does St. Catharines get?
St. Catharines gets around 2,060 hours of sunshine a year. The sunniest month is July with 8.8 hours a day; in December there are 2.4 hours a day.
What time zone is St. Catharines in?
St. Catharines is on UTC−5 in January and UTC−4 in July.
How long is the flight from London to St. Catharines?
A nonstop flight from London to St. Catharines takes about 7 h 25 min, for a straight-line distance of about 5,720 km.
Which school holidays are best for St. Catharines?
St. Catharines 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 40, May half-term 80, summer holidays 82, October half-term 57, Christmas holidays 13.