Boise (ID)
May
Weather in Boise, Idaho for May 2026
Your guide to Boise weather in May - trends and predictions
With an average of 2 snowy days, Boise usually enjoys a light touch of snow in May.
In general, the average temperature in Boise at the beginning of May is 16.7 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 23.7 °F by the end of May.
Boise experiences moderate rainfall in May, with an average of 6 rainy days and a total precipitation of 54.7 mm.
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Snow Forecast ❄️
Temperatures
Rain 🌧️
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23
Dry days
6
Rainy days
2
Snow days
16°/7°
Temperatures
20 km/h
Avg max wind
51 %
Avg humidity
Boise Weather May
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Temperatures trend during May in Boise
See the weather trend as well as the moving average line
May weather in Boise day by day
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| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| May 1 |  Patchy rain possible | 17° /2° | 0.2 mm | 0 cm | |
| May 2 |  Patchy light drizzle | 20° /7° | 0.1 mm | 0 cm | |
| May 3 |  Sunny | 19° /5° | 0 mm | 0 cm | |
| May 4 | Light drizzle | 16° /6° | 12.2 mm | 0 cm | |
| May 5 |  Moderate or heavy snow showers | 15° /1° | 8.7 mm | 0.5 cm | |
| May 6 |  Patchy light rain with thunder | 13° /4° | 3.4 mm | 0 cm | |
| May 7 | Moderate or heavy snow showers | 17° /5° | 1 mm | 0.4 cm | |
| May 8 |  Overcast | 19° /6° | 0 mm | 0 cm | |
| May 9 | Sunny | 23° /7° | 0 mm | 0 cm | |
| May 10 |  Partly cloudy | 24° /12° | 0 mm | 0 cm | |
| May 11 | Sunny | 23° /12° | 0 mm | 0 cm | |
| May 12 | Sunny | 20° /10° | 0 mm | 0 cm | |
| May 13 | Partly cloudy | 19° /8° | 0 mm | 0 cm | |
| May 14 | Sunny | 18° /7° | 0 mm | 0 cm | |
| May 15 | Sunny | 18° /7° | 0 mm | 0 cm | |
| May 16 | Sunny | 21° /10° | 0 mm | 0 cm | |
| May 17 | Sunny | 14° /8° | 14.8 mm | 0 cm | |
| May 18 | Partly cloudy | 13° /4° | 15.3 mm | 0 cm | |
| May 19 | Sunny | 15° /3° | 0 mm | 0 cm | |
| May 20 |  Thundery outbreaks possible | 17° /6° | 0 mm | 0 cm | |
| May 21 | Partly cloudy | 18° /5° | 0.7 mm | 0 cm | |
| May 22 |  Moderate or heavy rain with thunder | 19° /7° | 8.4 mm | 0 cm | |
| May 23 | Patchy rain possible | 19° /5° | 0 mm | 0 cm | |
| May 24 | Overcast | 23° /9° | 0 mm | 0 cm | |
| May 25 | Patchy rain possible | 23° /10° | 0.7 mm | 0 cm | |
| May 26 | Sunny | 21° /9° | 0 mm | 0 cm | |
| May 27 | Overcast | 24° /10° | 0 mm | 0 cm | |
| May 28 | Patchy light rain with thunder | 27° /13° | 1.3 mm | 0 cm | |
| May 29 | Partly cloudy | 23° /12° | 0.4 mm | 0 cm | |
| May 30 | Sunny | 21° /7° | 0 mm | 0 cm | |
| May 31 | Sunny | 27° /11° | 0 mm | 0 cm | |
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Important Notice
Our weather forecast for Boise in May is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Boise forecast closer to your planned date for the most up-to-date weather information.
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Boise in May - FAQ
What are the expected maximum and minimum temperatures in Boise during May?
Enjoy moderate daytime temperatures of up to 16° and cooler nights around 7°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Boise during May?
Moderate rainfall is anticipated in Boise during May, with a total of 54.7 mm spread over approximately 6 days. Considering plans for rainy days is advisable.
Will it snow in Boise in May 2026?
Boise experiences an average snowfall of 1.89 cm during May, occurring over 2 days.
What are the typical wind conditions in Boise during May?
The average wind speed in Boise during May is 20 km/h, suggesting breezy to windy conditions, depending on your activities.
Boise snow forecast May 2026
Track daily snowfall levels and discover Boise’s snowy potential this May ❄️
May rainfall patterns in Boise
Explore the daily rainfall trends and prepare for Boises May weather 💧
UV exposure in Boise during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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