Ideal weather days in Boise
The best time to visit Boise for warm, dry weather is May to June and September to October, with 18 to 22 such days a month.
How many days here suit you?
Set your ideal day. Each day measured at Boise's weather station in 2023–2025 is checked against it.
They're most common in May to June and September to October.
This station doesn't record cloud cover, so the sky setting is left out here.
Open the full map Zoom with ctrl or ⌘ and scroll.Move and zoom with two fingers.
Your ideal days in Boise, month by month
Why the other days don't count
- Too cold164
- Too hot68
- Too wet61
- Too windy20
A day can fail more than one test.
Warm and dry, beach and mild days
With the Warm & dry preset (a high of 18–33 °C, no more than 1 mm of rain, wind under 20 km/h), Boise averaged 117 days a year in 2023–2025. Every number here is counted from real measured days in the United States, not from climate averages.
Beach days (a high of 26–35 °C, almost no rain, mostly sunny) are most common in June, August and September (up to 17 a month, 87 a year). Mild, still days (16–26 °C, light wind) are most common in October (up to 12 a month, 40 a year).
What spoils the other days
Most of the days that don't count are too cold (a high under 18 °C): 164 a year, mostly in November to March. Another 68 are too hot (over 33 °C), mostly in July and August. A day can fail more than one test.
Boise weather, month by month
| Month | Typical high | Rain days | Windy days | Clear days | Warm & dry days |
|---|---|---|---|---|---|
| January | 6 °C 42 °F | 9 | 1 | 12 | 0 of 31 |
| February | 10 °C 49 °F | 10 | 2 | 10 | 0 of 28 |
| March | 13 °C 55 °F | 11 | 3 | 11 | 5 of 31 |
| April | 19 °C 66 °F | 5 | 4 | 16 | 16 of 30 |
| May | 26 °C 78 °F | 6 | 3 | 21 | 22 of 31 |
| June | 31 °C 87 °F | 4 | 1 | 25 | 18 of 30 |
| July | 37 °C 98 °F | 1 | 0 | 30 | 4 of 31 |
| August | 35 °C 95 °F | 2 | 0 | 29 | 9 of 31 |
| September | 31 °C 87 °F | 4 | 0 | 26 | 19 of 30 |
| October | 23 °C 73 °F | 5 | 1 | 24 | 21 of 31 |
| November | 12 °C 54 °F | 8 | 4 | 13 | 3 of 30 |
| December | 6 °C 43 °F | 12 | 1 | 10 | 0 of 31 |
| Year | 76 | 20 | 225 | 117 of 365 |
Typical high is the median daily maximum. A rain day has 1 mm or more; a windy day a mean wind above 20 km/h; a clear day a daytime cloud cover of 2/8 or less on average (9:00–17:00). Days are averaged over 2023–2025 and scaled to the length of each month.
Year by year
- 2023 111 warm, dry days
- 2024 111 warm, dry days
- 2025 incomplete (8 of 12 months)
Questions
When is the best time to visit Boise for good weather?
The best time to visit Boise for warm, dry weather is May to June and September to October, with 18 to 22 such days a month. Beach days (a high of 26–35 °C, almost no rain, mostly sunny) are most common in June, August and September (up to 17 a month, 87 a year). Counted from measured days at Boise Air Terminal station, 2023–2025.
Does it rain a lot in Boise?
On average 76 days a year had 1 mm of rain or more in 2023–2025. The wettest month was December (12 rain days), the driest July (1).
How many sunny days does Boise get a year?
About 225 days a year had mostly clear skies (daytime cloud cover of 2/8 or less on average, 9:00–17:00), most of them in July (30).
How warm does Boise get?
The median daily high ranged from 6 °C (42 °F) in January to 37 °C (98 °F) in July.
Nearby
- Salt Lake City480 km107 days
- Seattle650 km142 days
- Billings650 km116 days
- Sacramento710 km169 days
- Vancouver820 km, Canada108 days
More cities in the United States
- San Diego 317 days
- Tijuana 311 days
- Los Angeles 296 days
- Honolulu 224 days
- Orlando 203 days
- Tampa 194 days
- Miami 181 days
- Charlotte 177 days
- Atlanta 168 days
- Phoenix 166 days
- San Francisco 162 days
- San Antonio 157 days
- Denver 151 days
- Nashville 150 days
- New Orleans 144 days
- St. Louis 143 days
- Houston 141 days
- Kansas City 135 days
- Austin 134 days
- Albuquerque 132 days
- Detroit 131 days
- Dallas 129 days
- New York 129 days
- Las Vegas 126 days
- Chicago 120 days
- Minneapolis 120 days
- Boston 116 days
- Fairbanks 81 days
- Anchorage 55 days
- Juneau 45 days
Where is the best climate in the United States?
Open Boise on the map Set your own temperature, rain and wind limits.
Source: Boise Air Terminal weather station (72681024131), 7 km from the centre of Boise, 861 m above sea level. Daily records from NOAA's Global Surface Summary of the Day, 2023–2025; 89% of days have a complete record. A single station may not represent every part of a city, and three years is a short record.