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Weather in Idaho Falls, Idaho for May 2026

Your guide to Idaho Falls weather in May - trends and predictions

    Snow Forecast ❄️

  • Snowfall in Idaho Falls during May is quite rare, with fewer than 2 snowy days on average.

    • Temperatures

  • In general, the average temperature in Idaho Falls at the beginning of May is 18.9 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 26 °F by the end of May.

    • Rain 🌧️

  • Idaho Falls experiences moderate rainfall in May, with an average of 10 rainy days and a total precipitation of 54.4 mm.

    • More

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

Average dry days
20
Dry days
Average rainy days
10
Rainy days
Average snowy days
1
Snow days
Average temperatures
20°/4°
Temperatures
Average wind speed
20 km/h
Avg max wind
Average humidity
63 %
Avg humidity

Idaho Falls Weather May

Move between months or click on a day
April
June
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Sunny
18°
2
Partly cloudy
22°
3
Partly cloudy
24°
4
Overcast
18°
5
Patchy rain possible
13°
6
Overcast
16°
7
Partly cloudy
21°
8
Partly cloudy
24°
9
Partly cloudy
26°
10
Patchy rain possible
28°
11
Moderate rain at times
22°
12
Overcast
25°
13
Patchy rain possible
11°
14
Heavy rain at times
11°
15
Moderate or heavy rain shower
12°
16
Patchy rain possible
13°
17
Moderate or heavy rain shower
17°
18
Moderate or heavy rain shower
8°
19
Patchy rain possible
14°
20
Heavy rain at times
14°
21
Sunny
17°
22
Patchy rain possible
22°
23
Cloudy
19°
24
Partly cloudy
23°
25
Sunny
24°
26
Sunny
25°
27
Mist
25°
28
Overcast
24°
29
Sunny
28°
30
Sunny
27°
31
Sunny
29°

Temperatures trend during May in Idaho Falls

See the weather trend as well as the moving average line

May weather in Idaho Falls day by day

Click on a date for more information
April June
Date Weather Temperatures Rain Snow More
May 1 Sunny
Sunny
 18° /2° 0 mm 0 cm
May 2 Partly cloudy
Partly cloudy
 22° /0° 0 mm 0 cm
May 3 Partly cloudy
Partly cloudy
 24° /2° 0 mm 0 cm
May 4 Overcast
Overcast
 18° /7° 0.8 mm 0 cm
May 5 Patchy rain possible
Patchy rain possible
 13° /3° 4.7 mm 0 cm
May 6 Overcast
Overcast
 16° /0° 4.4 mm 1.1 cm
May 7 Partly cloudy
Partly cloudy
 21° /4° 0 mm 0 cm
May 8 Partly cloudy
Partly cloudy
 24° /5° 0 mm 0 cm
May 9 Partly cloudy
Partly cloudy
 26° /6° 0 mm 0 cm
May 10 Patchy rain possible
Patchy rain possible
 28° /6° 0.4 mm 0 cm
May 11 Moderate rain at times
Moderate rain at times
 22° /11° 1.1 mm 0 cm
May 12 Overcast
Overcast
 25° /8° 0 mm 0 cm
May 13 Patchy rain possible
Patchy rain possible
 11° /5° 0.1 mm 0 cm
May 14 Heavy rain at times
Heavy rain at times
 11° /4° 5.5 mm 0 cm
May 15 Moderate or heavy rain shower
Moderate or heavy rain shower
 12° /3° 16.6 mm 0 cm
May 16 Patchy rain possible
Patchy rain possible
 13° /2° 0.1 mm 0 cm
May 17 Moderate or heavy rain shower
Moderate or heavy rain shower
 17° /2° 3.7 mm 0 cm
May 18 Moderate or heavy rain shower
Moderate or heavy rain shower
 8° /3° 14 mm 0 cm
May 19 Patchy rain possible
Patchy rain possible
 14° /2° 1.5 mm 0 cm
May 20 Heavy rain at times
Heavy rain at times
 14° /4° 1.3 mm 0 cm
May 21 Sunny
Sunny
 17° /0° 0 mm 0 cm
May 22 Patchy rain possible
Patchy rain possible
 22° /1° 0.2 mm 0 cm
May 23 Cloudy
Cloudy
 19° /3° 0 mm 0 cm
May 24 Partly cloudy
Partly cloudy
 23° /4° 0 mm 0 cm
May 25 Sunny
Sunny
 24° /3° 0 mm 0 cm
May 26 Sunny
Sunny
 25° /5° 0 mm 0 cm
May 27 Mist
Mist
 25° /7° 0 mm 0 cm
May 28 Overcast
Overcast
 24° /8° 0 mm 0 cm
May 29 Sunny
Sunny
 28° /9° 0 mm 0 cm
May 30 Sunny
Sunny
 27° /9° 0 mm 0 cm
May 31 Sunny
Sunny
 29° /9° 0 mm 0 cm
Next
Important Notice
Our weather forecast for Idaho Falls 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 Idaho Falls forecast closer to your planned date for the most up-to-date weather information.
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Idaho Falls in May - FAQ

What are the expected maximum and minimum temperatures in Idaho Falls during May?
During May, expect a variety of temperatures with highs around 20° and lows near 4°, suitable for diverse activities and preferences.
How much rainfall should be expected in Idaho Falls during May?
Moderate rainfall is anticipated in Idaho Falls during May, with a total of 54.4 mm spread over approximately 10 days. Considering plans for rainy days is advisable.
Will it snow in Idaho Falls in May 2026?
Idaho Falls typically sees 1.1 cm of snowfall during May.
What are the typical wind conditions in Idaho Falls during May?
The average wind speed in Idaho Falls during May is 20 km/h, suggesting breezy to windy conditions, depending on your activities.

Idaho Falls snow forecast May 2026

Track daily snowfall levels and discover Idaho Falls’s snowy potential this May ❄️

May rainfall patterns in Idaho Falls

Explore the daily rainfall trends and prepare for Idaho Fallss May weather 💧

UV exposure in Idaho Falls 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 Idaho Falls?

Get accurate weather forecasts for Idaho Falls, located at latitude 43.467 and longitude -112.034. Stay updated with localized weather information tailored for Idaho Falls.

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