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Weather in Boise, Idaho for May 2026

Your guide to Boise weather in May - trends and predictions

    Snow Forecast ❄️

  • With an average of 2 snowy days, Boise usually enjoys a light touch of snow in May.

    • Temperatures

  • 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.

    • Rain 🌧️

  • Boise experiences moderate rainfall in May, with an average of 6 rainy days and a total precipitation of 67.3 mm.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
23
Dry days
Average rainy days
6
Rainy days
Average snowy days
2
Snow days
Average temperatures
19°/8°
Temperatures
Average wind speed
20 km/h
Avg max wind
Average humidity
51 %
Avg humidity

Boise Weather May

Move between months or click on a day
April
June
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Patchy rain possible
17°
2
Patchy light drizzle
20°
3
Sunny
19°
4
Light drizzle
16°
5
Moderate or heavy snow showers
15°
6
Patchy light rain with thunder
13°
7
Moderate or heavy snow showers
17°
8
Overcast
19°
9
Sunny
23°
10
Partly cloudy
24°
11
Sunny
23°
12
Sunny
20°
13
Partly cloudy
19°
14
Sunny
18°
15
Sunny
18°
16
Sunny
21°
17
Sunny
14°
18
Partly cloudy
13°
19
Sunny
15°
20
Thundery outbreaks possible
17°
21
Partly cloudy
18°
22
Moderate or heavy rain with thunder
19°
23
Patchy rain possible
19°
24
Overcast
23°
25
Patchy rain possible
23°
26
Sunny
21°
27
Overcast
24°
28
Patchy light rain with thunder
27°
29
Partly cloudy
23°
30
Sunny
21°
31
Sunny
27°

Temperatures trend during May in Boise

See the weather trend as well as the moving average line

May weather in Boise day by day

Click on a date for more information
April June
Date Weather Temperatures Rain Snow More
May 1 Patchy rain possible
Patchy rain possible
 17° /2° 0.2 mm 0 cm
May 2 Patchy light drizzle
Patchy light drizzle
 20° /7° 0.1 mm 0 cm
May 3 Sunny
Sunny
 19° /5° 0 mm 0 cm
May 4 Light drizzle
Light drizzle
 16° /6° 12.2 mm 0 cm
May 5 Moderate or heavy snow showers
Moderate or heavy snow showers
 15° /1° 8.7 mm 0.5 cm
May 6 Patchy light rain with thunder
Patchy light rain with thunder
 13° /4° 3.4 mm 0 cm
May 7 Moderate or heavy snow showers
Moderate or heavy snow showers
 17° /5° 1 mm 0.4 cm
May 8 Overcast
Overcast
 19° /6° 0 mm 0 cm
May 9 Sunny
Sunny
 23° /7° 0 mm 0 cm
May 10 Partly cloudy
Partly cloudy
 24° /12° 0 mm 0 cm
May 11 Sunny
Sunny
 23° /12° 0 mm 0 cm
May 12 Sunny
Sunny
 20° /10° 0 mm 0 cm
May 13 Partly cloudy
Partly cloudy
 19° /8° 0 mm 0 cm
May 14 Sunny
Sunny
 18° /7° 0 mm 0 cm
May 15 Sunny
Sunny
 18° /7° 0 mm 0 cm
May 16 Sunny
Sunny
 21° /10° 0 mm 0 cm
May 17 Sunny
Sunny
 14° /8° 14.8 mm 0 cm
May 18 Partly cloudy
Partly cloudy
 13° /4° 15.3 mm 0 cm
May 19 Sunny
Sunny
 15° /3° 0 mm 0 cm
May 20 Thundery outbreaks possible
Thundery outbreaks possible
 17° /6° 0 mm 0 cm
May 21 Partly cloudy
Partly cloudy
 18° /5° 0.7 mm 0 cm
May 22 Moderate or heavy rain with thunder
Moderate or heavy rain with thunder
 19° /7° 8.4 mm 0 cm
May 23 Patchy rain possible
Patchy rain possible
 19° /5° 0 mm 0 cm
May 24 Overcast
Overcast
 23° /9° 0 mm 0 cm
May 25 Patchy rain possible
Patchy rain possible
 23° /10° 0.7 mm 0 cm
May 26 Sunny
Sunny
 21° /9° 0 mm 0 cm
May 27 Overcast
Overcast
 24° /10° 0 mm 0 cm
May 28 Patchy light rain with thunder
Patchy light rain with thunder
 27° /13° 1.3 mm 0 cm
May 29 Partly cloudy
Partly cloudy
 23° /12° 0.4 mm 0 cm
May 30 Sunny
Sunny
 21° /7° 0 mm 0 cm
May 31 Sunny
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 19° and cooler nights around 8°. 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 67.3 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 0.945 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 ☀️

Quick links

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Location coordinates Where is Boise?

Get accurate weather forecasts for Boise, located at latitude 43.614 and longitude -116.203. Stay updated with localized weather information tailored for Boise.

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