May is one of the warmer months of the year in Pocatello, with average highs near 19°C and lows around 4.6°C (mean 11.8°C). It is a relatively wet time of year, averaging 47 mm of rainfall and 54% relative humidity across the period.
May is one of the warmer months of the year in Pocatello. Across 45 years of records, the warmest May in Pocatello was 1992 — when the month averaged 15.8°C — while the coldest was 2010 at 7.8°C. Typical May days reach 19°C with nights near 4.6°C. The long-term May temperature trend is broadly flat.
May is a relatively wet time of year in Pocatello, averaging 47 mm of rainfall. The wettest May on record was 2015 with 113 mm, while the driest was 1992 at 8 mm.
Relative humidity in Pocatello during May averages 54%. The most humid May was 2011 at 64%, and the least humid was 2001 at 38%.
May receives about 6.4 kWh/m²/day of solar energy in Pocatello. The sunniest May was 2001 at 7.5 kWh/m²/day, and the cloudiest was 2011 at 5.3.
Average wind speed in Pocatello during May is 2.6 m/s. The windiest May was 1984 at 3.2 m/s, while the calmest was 2023 at 2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 11.4°C | 11.8°C | 12.5°C | 11.5°C | 11.9°C | +0.5°C |
| Avg High | 18.8°C | 18.9°C | 19.9°C | 18.3°C | 18.9°C | +0.1°C |
| Avg Low | 4.0°C | 4.7°C | 5.1°C | 4.6°C | 4.8°C | +0.8°C |
| Avg Rain | 43 mm | 57 mm | 35 mm | 52 mm | 44 mm | +2 mm |
May temperatures in Pocatello have risen by about 1°C between 1981–1985 and 2021–2025.
May has ranged from a record low of -6.3°C (2002) to a record high of 34.9°C (2003).
Rainfall in May is a relatively wet time of year, averaging 47 mm, with a wettest year of 113 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0°C per decade while lows rose 0.2°C per decade, narrowing the gap between day and night.
A good time to visit Pocatello
May is a good time to visit Pocatello, with days averaging 19°C and nights around 4.6°C (mean 11.8°C, warmer than Pocatello's yearly average) and moderate rainfall. August and July are marginally more temperate, but May still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 21.5°C | 14.0°C | 6.5°C | 31.5°C | 1.4°C | 41 mm | 53% | 2.4 m/s | 6.7 |
| 2024 | 16.6°C | 9.5°C | 2.5°C | 27.7°C | -4.2°C | 41 mm | 58% | 3 m/s | 6.6 |
| 2023 | 19.7°C | 13.4°C | 7.1°C | 27.9°C | 0.4°C | 54 mm | 64% | 2 m/s | 6.1 |
| 2022 | 16.3°C | 9.7°C | 3.1°C | 29.7°C | -3.0°C | 53 mm | 57% | 2.8 m/s | 6.2 |
| 2021 | 19.8°C | 12.2°C | 4.6°C | 27.1°C | -2.5°C | 30 mm | 49% | 2.4 m/s | 6.8 |
| 2020 | 19.6°C | 12.3°C | 5.0°C | 32.7°C | -2.2°C | 47 mm | 55% | 2.7 m/s | 6.7 |
| 2019 | 17.2°C | 10.8°C | 4.4°C | 25.5°C | -5.3°C | 65 mm | 61% | 2.5 m/s | 5.7 |
| 2018 | 20.7°C | 13.9°C | 7.1°C | 28.3°C | -0.9°C | 50 mm | 62% | 2.1 m/s | 6.5 |
| 2017 | 18.9°C | 11.6°C | 4.3°C | 28.4°C | -3.0°C | 22 mm | 60% | 2.2 m/s | 6.9 |
| 2016 | 18.9°C | 11.9°C | 4.9°C | 26.7°C | -1.3°C | 58 mm | 57% | 2.5 m/s | 6.5 |
| 2015 🌧️ | 18.7°C | 12.3°C | 5.8°C | 28.8°C | 0.1°C | 113 mm | 61% | 2.2 m/s | 5.5 |
| 2014 | 20.6°C | 13.3°C | 5.9°C | 28.8°C | -2.3°C | 20 mm | 49% | 2.7 m/s | 7 |
| 2013 | 19.5°C | 12.3°C | 5.2°C | 30.0°C | -4.1°C | 29 mm | 52% | 2.5 m/s | 6.6 |
| 2012 | 19.8°C | 12.3°C | 4.7°C | 29.8°C | -2.5°C | 38 mm | 47% | 2.6 m/s | 6.8 |
| 2011 | 14.7°C | 8.4°C | 2.1°C | 23.8°C | -2.9°C | 78 mm | 64% | 2.8 m/s | 5.3 |
| 2010 ❄️ | 14.3°C | 7.8°C | 1.3°C | 25.8°C | -4.2°C | 50 mm | 57% | 2.8 m/s | 5.5 |
| 2009 | 19.4°C | 12.3°C | 5.3°C | 30.3°C | -4.5°C | 42 mm | 53% | 2.3 m/s | 6.7 |
| 2008 | 17.9°C | 10.8°C | 3.7°C | 29.5°C | -3.7°C | 47 mm | 55% | 2.4 m/s | 6.2 |
| 2007 | 21.5°C | 13.7°C | 5.9°C | 29.3°C | -2.2°C | 11 mm | 44% | 2.9 m/s | 7.2 |
| 2006 | 19.9°C | 12.5°C | 5.1°C | 29.7°C | -2.6°C | 23 mm | 54% | 2.5 m/s | 7 |
| 2005 | 18.8°C | 11.8°C | 4.7°C | 26.5°C | -2.5°C | 89 mm | 60% | 2.5 m/s | 6.3 |
| 2004 | 18.6°C | 11.9°C | 5.2°C | 26.9°C | 0.1°C | 45 mm | 51% | 3 m/s | 6.2 |
| 2003 | 20.3°C | 12.8°C | 5.4°C | 34.9°C | -3.6°C | 26 mm | 48% | 2.5 m/s | 6.8 |
| 2002 | 19.5°C | 11.9°C | 4.3°C | 32.2°C | -6.3°C | 30 mm | 45% | 2.9 m/s | 7 |
| 2001 | 22.9°C | 14.5°C | 6.1°C | 32.2°C | -3.3°C | 11 mm | 38% | 3.1 m/s | 7.5 |
| 2000 | 20.4°C | 13.0°C | 5.7°C | 27.4°C | -4.1°C | 29 mm | 49% | 3.1 m/s | 6.5 |
| 1999 | 16.8°C | 10.0°C | 3.1°C | 28.1°C | -5.1°C | 66 mm | 57% | 2.5 m/s | 6.1 |
| 1998 | 17.6°C | 10.9°C | 4.3°C | 24.6°C | -1.7°C | 77 mm | 60% | 2.6 m/s | 6.1 |
| 1997 | 20.6°C | 13.1°C | 5.6°C | 31.3°C | -4.7°C | 35 mm | 56% | 2.2 m/s | 7.1 |
| 1996 | 16.7°C | 10.2°C | 3.6°C | 26.3°C | -3.4°C | 83 mm | 59% | 2.8 m/s | 5.9 |
| 1995 | 16.2°C | 9.9°C | 3.5°C | 24.9°C | -1.2°C | 66 mm | 64% | 2.3 m/s | 5.7 |
| 1994 | 22.1°C | 14.4°C | 6.6°C | 28.5°C | 2.0°C | 42 mm | 50% | 2.6 m/s | 6.2 |
| 1993 | 20.9°C | 13.5°C | 6.1°C | 27.0°C | -2.5°C | 69 mm | 56% | 2.5 m/s | 6.3 |
| 1992 🔥 | 23.8°C | 15.8°C | 7.9°C | 29.4°C | 0.9°C | 8 mm | 39% | 2.5 m/s | 6.8 |
| 1991 | 17.1°C | 10.2°C | 3.2°C | 24.0°C | -1.6°C | 84 mm | 57% | 2.6 m/s | 5.6 |
| 1990 | 17.5°C | 10.2°C | 3.0°C | 26.6°C | -5.0°C | 44 mm | 50% | 2.7 m/s | 6.2 |
| 1989 | 18.9°C | 11.3°C | 3.8°C | 26.7°C | -3.4°C | 25 mm | 51% | 2.6 m/s | 6.4 |
| 1988 | 20.0°C | 12.3°C | 4.6°C | 30.0°C | -4.8°C | 24 mm | 46% | 2.9 m/s | 6.8 |
| 1987 | 20.9°C | 13.9°C | 6.8°C | 30.6°C | -0.4°C | 70 mm | 52% | 2.3 m/s | 6 |
| 1986 | 18.4°C | 10.7°C | 3.0°C | 29.6°C | -4.1°C | 43 mm | 56% | 2.8 m/s | 6.6 |
| 1985 | 21.2°C | 13.3°C | 5.5°C | 28.2°C | -4.0°C | 37 mm | 47% | 2.6 m/s | 6.3 |
| 1984 | 17.7°C | 10.4°C | 3.2°C | 29.6°C | -4.1°C | 20 mm | 57% | 3.2 m/s | 6.2 |
| 1983 | 16.6°C | 9.5°C | 2.4°C | 29.2°C | -4.9°C | 40 mm | 58% | 2.5 m/s | — |
| 1982 | 17.3°C | 9.9°C | 2.5°C | 24.4°C | -5.1°C | 38 mm | 56% | 2.4 m/s | — |
| 1981 | 18.0°C | 11.1°C | 4.3°C | 27.6°C | -2.5°C | 89 mm | 57% | 2.6 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 19°C with lows near 4.6°C (mean 11.8°C), based on 45 years of NASA POWER data.
May averages 47 mm of rainfall in Pocatello, a relatively wet time of year. The wettest on record was 113 mm in 2015.
The hottest May reached 34.9°C in 2003. The coldest dipped to -6.3°C in 2002.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 1°C. Daytime highs moved from 18.2°C to 18.8°C and overnight lows from 3.6°C to 4.8°C over the same span.
May is one of the warmer months of the year in Pocatello and a relatively wet time of year, so plan for around 19°C daytime highs and 4.6°C at night.
Not quite — May is the 8th coolest month in Pocatello, averaging 11.8°C.
For May in Pocatello, pack warm layers and a jacket for chilly mornings, with typical highs of 19°C and lows of 4.6°C.
Relative humidity in May averages 54% — relatively dry.
Average wind speed in May is 2.6 m/s. The windiest May on record averaged 3.2 m/s (1984).
The wettest May on record was 2015 with 113 mm. On average, May sees 47 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Pocatello behaves each May, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for May specifically, along with year-by-year records and how the month has changed over the decades.
