AI-generatedBoise at a glance
- Best time
- May – Jun, Sep – Oct
- Warmest month
- Jul · 34°
- Sunshine a year
- 2,810 h
- Rain a year
- 282 mm
- Climate
- Continental
- Time zone
- UTC−7 / UTC−6
- Elevation
- 823 m
Climate in Boise
Boise has warm to hot summers and cold winters with occasional snow. July is the warmest month with average highs of 34 °C, while January is the coolest at 4 °C. With around 2,810 hours of sunshine a year, Boise is sunny; July is the sunniest month with 12.0 hours a day.
Holiday weather through the year
Weather in October
Holiday weather in October
Excellent
Best time to visit: May – June, September – October
Good forSightseeing & walks
A typical day in October
- Morning, 08:00: about 6°
- Midday, 13:00: about 16°
- Afternoon, 16:00: about 18°
- Evening, 20:00: about 13°
- Night, 23:00: about 10°
07:5719:03
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 07:40–08:36 · evening 18:25–19:21
- Blue hour
- Morning 07:29–07:40 · evening 19:21–19:32
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.
What is the weather like in Boise in October?
In October, Boise is mild: daytime highs average 18 °C, and nights cool down to about 6 °C. The sun shines for around 7 hours a day. Rain is rare: about 4 days bring 21 mm in total. All in all, October is an excellent month for a holiday in Boise.
More details for October
- Daylight
- 11 h 6 min07:57 – 19:03
- UV index
- 3 · moderateclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 15 km/haverage daily peakAll months
- Cloud cover
- 40 %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−6America/Boise
How the score comes together
- Temperatureweight 50 %98 %
- Sunshineweight 20 %67 %
- Few rainy daysweight 30 %100 %
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
Sunshine hours in Boise
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 7.0 of 11.1 hours of daylight in Boise, 63 % of the day.
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.
UV index in Boise
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 10).
Minutes until sunburn in October
- Very fair skin
- about 40 min
- Fair skin
- about 50 min
- Light brown skin
- about 65 min
- Olive skin
- about 85 min
Rough guide for unprotected skin at noon under a clear sky; clouds lengthen it, 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.
Rain in Boise: 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, Boise has about 4 rainy days with 21 mm of rain in total.
Wind and clouds in Boise
How breezy and how cloudy Boise 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 Boise typically peaks at 15 km/h during the day: Beaufort 3, light breeze.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 40 % of the sky over Boise: mostly sunny, with about 7.0 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 and humidity in Boise
How often the day gets hot in Boise (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, Boise has about 0 hot days, with an average daytime high of 18 °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 in Boise
Snow is possible in Boise, but no month makes it likely: 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 Boise.
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.
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Boise
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 6°. The room should be heated.
The coolest nights are in January (−5°), the warmest in July (19°). Nights are pleasant for sleeping (15 to 20 °C) from July to August. 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 | 25 | 4° | −5° | 4.5 h | 9 | 39 |
| FebruaryFeb | 30 | 7° | −3° | 5.3 h | 8 | 28 |
| MarchMar | 50 | 12° | 1° | 6.4 h | 9 | 33 |
| AprilApr | 83 | 16° | 4° | 7.9 h | 6 | 26 |
| MayMay | 96 | 22° | 9° | 9.3 h | 6 | 29 |
| JuneJun | 99 | 27° | 13° | 10.8 h | 3 | 14 |
| JulyJul | 59 | 34° | 19° | 12.0 h | 1 | 3 |
| AugustAug | 68 | 32° | 18° | 11.0 h | 1 | 5 |
| SeptemberSep | 100 | 26° | 13° | 9.2 h | 2 | 11 |
| OctoberOct | 92 | 18° | 6° | 7.0 h | 4 | 21 |
| NovemberNov | 38 | 10° | 0° | 4.8 h | 7 | 29 |
| DecemberDec | 21 | 4° | −4° | 4.0 h | 10 | 45 |
Climate averages 1996–2025, 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
43.61° N, 116.20° W · 823 m · America/Boise
Best time to visit Boise
The best time to visit Boise is from May to June and from September to October. For sightseeing, day trips and hiking, conditions are most comfortable from April to June and from September to October. In July it can get very hot, with highs of up to 34 °C. The wettest month is December with 45 mm of precipitation.
Boise through the seasons
How the weather changes over the seasons, with averages for each.
Boise in spring
Mar – May
Good
- 12–22 °C by day
- 8 h of sun a day
- 21 rainy days in all
Boise in summer
Jun – Aug
Good
- 27–34 °C by day
- 11 h of sun a day
- 5 rainy days in all
Boise in autumn
Sep – Nov
Good
- 10–26 °C by day
- 7 h of sun a day
- 13 rainy days in all
Boise in winter
Dec – Feb
Poor
- 4–7 °C by day
- 5 h of sun a day
- 26 rainy days in all
Find your perfect month
Tell us what you like and we rate every month in Boise for you.
Your best months: May, September
Based on the climate averages; tap a month to see its details.
Compare two months in Boise
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
September has the better holiday weather in Boise: score 100 against 92. In September, days are 8 °C warmer than in October. September has 2 fewer rainy days. The sun shines 2 hours longer a day in September.
| Month | October | September |
|---|---|---|
| Weather score | 92 | 100better |
| Day high | 18° | 26° |
| Night low | 6° | 13° |
| Sunshine | 7.0 h | 9.2 hbetter |
| Rainy days | 4 | 2better |
| Rainfall | 21 mm | 11 mmbetter |
Based on the climate averages 1996–2025.
Which month for what?
Beach & swimming
No sea nearby
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
Apr – Jun, Sep – Oct
15–28 °C and not too much rain
Peak heat
Jul
Highs of 33 °C or more
Snow
Dec – Jan
Snow on 2 or more days
Boise month by month
The typical weather for every month at a glance.
25January4° · 5 h
In January, Boise is cold: daytime highs average 4 °C, and nights often drop below freezing (−5 °C). Expect around 5 hours of sunshine a day. Precipitation, often as snow, falls on about 9 days, totalling 39 mm. Snow falls on about 3 days. All in all, January is not an ideal month for a holiday in Boise.
Boise in January30February7° · 5 h
In February, Boise is cold: daytime highs average 7 °C, and nights often drop below freezing (−3 °C). Expect around 5 hours of sunshine a day. Rain falls on about 8 days, adding up to 28 mm. Snow falls on about 2 days. All in all, February is not an ideal month for a holiday in Boise.
Boise in February50March12° · 6 h
In March, Boise is cool: daytime highs average 12 °C, and nights cool down to about 1 °C. Expect around 6 hours of sunshine a day. Rain falls on about 9 days, adding up to 33 mm. All in all, March is a so-so month for a holiday in Boise.
Boise in March83April16° · 8 h
In April, Boise is mild: daytime highs average 16 °C, and nights cool down to about 4 °C. The sun shines for around 8 hours a day. Rain falls on about 6 days, adding up to 26 mm. All in all, April is an excellent month for a holiday in Boise.
Boise in April96May22° · 9 h
In May, Boise is warm: daytime highs average 22 °C, and nights cool down to about 9 °C. With around 9 hours of sunshine a day, there is plenty of sun. Rain falls on about 6 days, adding up to 29 mm. All in all, May is an excellent month for a holiday in Boise.
Boise in May99June27° · 11 h
In June, Boise is hot: daytime highs average 27 °C, and nights cool down to about 13 °C. With around 11 hours of sunshine a day, there is plenty of sun. Rain is rare: about 3 days bring 14 mm in total. On about 9 days the thermometer climbs to 30 °C or more. All in all, June is an excellent month for a holiday in Boise.
Boise in June59July34° · 12 h
In July, Boise is very hot: daytime highs average 34 °C, and nights cool down to about 19 °C. With around 12 hours of sunshine a day, there is plenty of sun. It hardly ever rains. On about 26 days the thermometer climbs to 30 °C or more. All in all, July is a so-so month for a holiday in Boise.
Boise in July68August32° · 11 h
In August, Boise is hot: daytime highs average 32 °C, and nights cool down to about 18 °C. With around 11 hours of sunshine a day, there is plenty of sun. It hardly ever rains. On about 23 days the thermometer climbs to 30 °C or more. All in all, August is a good month for a holiday in Boise.
Boise in August100September26° · 9 h
In September, Boise is warm: daytime highs average 26 °C, and nights cool down to about 13 °C. With around 9 hours of sunshine a day, there is plenty of sun. Rain is rare: about 2 days bring 11 mm in total. On about 8 days the thermometer climbs to 30 °C or more. All in all, September is an excellent month for a holiday in Boise.
Boise in September92October18° · 7 h
In October, Boise is mild: daytime highs average 18 °C, and nights cool down to about 6 °C. The sun shines for around 7 hours a day. Rain is rare: about 4 days bring 21 mm in total. All in all, October is an excellent month for a holiday in Boise.
Boise in October38November10° · 5 h
In November, Boise is cold: daytime highs average 10 °C, and nights cool down to about 0 °C. Expect around 5 hours of sunshine a day. Rain falls on about 7 days, adding up to 29 mm. All in all, November is not an ideal month for a holiday in Boise.
Boise in November21December4° · 4 h
In December, Boise is cold: daytime highs average 4 °C, and nights often drop below freezing (−4 °C). Expect around 4 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 45 mm in total. Snow falls on about 3 days. All in all, December is not an ideal month for a holiday in Boise.
Boise in DecemberBoise compared
Put Boise side by side with another destination.
No destination found
Boise vs. Sun Valley (Ketchum)
In October Boise has the better holiday weather (score 92 vs. 59). During the day Sun Valley (Ketchum) is 6 °C cooler than Boise.
| in October | Boise | Sun Valley (Ketchum) |
|---|---|---|
| Holiday score | 92 | 59 |
| Daytime high | 18° | 12° |
| Sunshine | 7 h | 7 h |
| Rainy days | 4 | 6 |
| Best time | May – Jun, Sep – Oct | Jun, Aug – Sep |
Through the year
USA in October: the best places
In October, Boise ranks 11 among the 31 nearest destinations in this country.
- Las Vegas26°99
- 2Mariposa (Yosemite)23°98
- 3Sacramento25°96
- 4Page (Lake Powell)21°96
- 5San Jose23°96
- 6Reno19°95
- 7Napa Valley24°95
- 8Moab21°95
- 11BoiseThis page18°92
Planning a trip to Boise
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Boise 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.
Boise has its best school-holiday weather during May half-term (score 97) and its weakest during the Christmas holidays (score 23).
- 73
Easter holidays
Mar – Apr
Good
- 15 °C by day
- 7.5 h of sun a day
- 7 rainy days a month
- 97
May half-term
May – Jun
ExcellentBest holidays
- 23 °C by day
- 9.6 h of sun a day
- 5 rainy days a month
Good for: Sightseeing & walks
- 65
Summer holidays
Jul – Aug
Good
- 33 °C by day
- 11.4 h of sun a day
- 1 rainy day a month
Keep in mind: Peak heat
- 92
October half-term
Oct
Excellent
- 18 °C by day
- 7.0 h of sun a day
- 4 rainy days a month
Good for: Sightseeing & walks
- 23
Christmas holidays
Dec – Jan
Poor
- 4 °C by day
- 4.3 h of sun a day
- 9 rainy days a month
Keep in mind: Snow
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- about 9 h 50 min
- Distance
- 7,770 km
- Time zone
- UTC−6
- Jet lag
- About 5 days (7 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.
Frequently asked questions about Boise
When is the best time to visit Boise?
The best time to visit Boise is from May to June and from September to October. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
What is the warmest month in Boise?
July is the warmest month, with average highs of 34 °C and nights around 19 °C. January is the coolest month at 4 °C.
When does it rain most in Boise?
The wettest month is December with 45 mm of precipitation. The driest month is July with 3 mm.
How many hours of sunshine does Boise get?
Boise gets around 2,810 hours of sunshine a year. The sunniest month is July with 12.0 hours a day; in December there are 4.0 hours a day.
What time zone is Boise in?
Boise uses the time zone America/Boise: UTC−7 in January and UTC−6 in July.
How long is the flight from London to Boise?
A nonstop flight from London to Boise takes about 9 h 50 min, for a straight-line distance of about 7,770 km.
Which school holidays are best for Boise?
Boise has its best school-holiday weather during May half-term (score 97) and its weakest during the Christmas holidays (score 23). Holiday ratings (0–100): Easter holidays 73, May half-term 97, Summer holidays 65, October half-term 92, Christmas holidays 23.
Near Boise
Other destinations close by.
Places with a climate like Boise
Destinations whose weather through the year is closest to Boise's – good alternatives.