Malheur County Weather in May
Average highs run from 69°F on May 1 to 77°F on May 31, and lows from 33°F to 41°F. Normal precipitation for the month is 1.45 in over about 10 wet days.
May day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
May at a glance
- Average high
- 73°F
- Average low
- 38°F
- Precipitation
- 1.45 in
- Record high
- 99°FMay 29, 2020
- Record low
- 15°FMay 9, 1999
- Chance of a freeze
- 100%
- Days of 90°F or more
- 1.6
- Daylight
- 14 h 08 min to 15 h 09 min
- Cloud cover
- 59%
- Humidity
- 49%
- Dew point
- 34°F
- Wind
- 8.1 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| May 1 | 69°F | 33°F | 83°F 2004 | 17°F 2008 | 31% |
| May 2 | 69°F | 34°F | 87°F 2004 | 20°F 2008 | 31% |
| May 3 | 69°F | 34°F | 87°F 2004 | 20°F 2001 | 31% |
| May 4 | 70°F | 34°F | 89°F 2004 | 23°F 2011 | 31% |
| May 5 | 70°F | 34°F | 85°F 2004 | 21°F 1999 | 31% |
| May 6 | 70°F | 35°F | 89°F 2021 | 22°F 2012 | 31% |
| May 7 | 71°F | 35°F | 82°F 2018 | 16°F 2010 | 31% |
| May 8 | 71°F | 35°F | 90°F 2018 | 16°F 2002 | 31% |
| May 9 | 71°F | 36°F | 87°F 2025 | 15°F 1999 | 31% |
| May 10 | 72°F | 36°F | 91°F 2026 | 17°F 1999 | 32% |
| May 11 | 72°F | 36°F | 90°F 2013 | 22°F 1999 | 32% |
| May 12 | 72°F | 37°F | 95°F 2026 | 23°F 2000 | 32% |
| May 13 | 73°F | 37°F | 91°F 2013 | 26°F 2014 | 32% |
| May 14 | 73°F | 37°F | 88°F 2012 | 25°F 1999 | 32% |
| May 15 | 73°F | 37°F | 91°F 2006 | 26°F 1999 | 32% |
| May 16 | 74°F | 38°F | 90°F 2006 | 22°F 1999 | 32% |
| May 17 | 74°F | 38°F | 95°F 2008 | 26°F 2011 | 32% |
| May 18 | 74°F | 38°F | 96°F 2009 | 28°F 1998 | 32% |
| May 19 | 74°F | 39°F | 90°F 2008 | 24°F 1950 | 32% |
| May 20 | 75°F | 39°F | 91°F 2023 | 24°F 2022 | 32% |
| May 21 | 75°F | 39°F | 89°F 2000 | 28°F 2022 | 32% |
| May 22 | 75°F | 39°F | 89°F 2001 | 29°F 2007 | 32% |
| May 23 | 75°F | 40°F | 94°F 2001 | 29°F 2007 | 32% |
| May 24 | 76°F | 40°F | 94°F 2001 | 30°F 2011 | 32% |
| May 25 | 76°F | 40°F | 91°F 2001 | 29°F 1950 | 32% |
| May 26 | 76°F | 40°F | 89°F 2022 | 27°F 1950 | 32% |
| May 27 | 76°F | 40°F | 91°F 2003 | 32°F 1998 | 31% |
| May 28 | 77°F | 41°F | 98°F 2003 | 29°F 2007 | 31% |
| May 29 | 77°F | 41°F | 99°F 2020 | 30°F 2014 | 31% |
| May 30 | 77°F | 41°F | 95°F 2020 | 31°F 2006 | 31% |
| May 31 | 77°F | 41°F | 98°F 2025 | 26°F 2000 | 30% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (MDT).
- May 1
- sunrise 6:44 AM, sunset 8:52 PM
- May 31
- sunrise 6:14 AM, sunset 9:23 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00357310 (Rome 2 Nw), public domain. Records: NOAA GHCN-Daily, station USW00094107, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.