Portales Weather in May
Average highs run from 80°F on May 1 to 90°F on May 31, and lows from 47°F to 58°F. Normal precipitation for the month is 1.51 in over about 6 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
- 85°F
- Average low
- 53°F
- Precipitation
- 1.51 in
- Record high
- 103°FMay 25, 2000
- Record low
- 27°FMay 3, 1954
- Chance of a freeze
- 8%
- Days of 90°F or more
- 9.9
- Daylight
- 13 h 34 min to 14 h 17 min
- Cloud cover
- 45%
- Humidity
- 38%
- Dew point
- 37°F
- Wind
- 11.4 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| May 1 | 80°F | 47°F | 91°F 1927 | 28°F 1929 | 15% | |
| May 2 | 80°F | 47°F | 96°F 1943 | 32°F 1953 | 15% | |
| May 3 | 81°F | 48°F | 98°F 1943 | 27°F 1954 | 15% | |
| May 4 | 81°F | 48°F | 98°F 1940 | 31°F 1935 | 15% | |
| May 5 | 81°F | 49°F | 98°F 1934 | 31°F 1917 | 15% | |
| May 6 | 81°F | 49°F | 97°F 1916 | 28°F 1917 | 16% | |
| May 7 | 82°F | 49°F | 95°F 2000 | 33°F 1960 | 16% | |
| May 8 | 82°F | 50°F | 99°F 1916 | 30°F 1938 | 16% | |
| May 9 | 82°F | 50°F | 96°F 1989 | 34°F 1965 | 17% | |
| May 10 | 83°F | 50°F | 95°F 1962 | 36°F 1918 | 17% | |
| May 11 | 83°F | 51°F | 96°F 1962 | 34°F 1946 | 17% | |
| May 12 | 83°F | 51°F | 96°F 1962 | 34°F 1966 | 18% | |
| May 13 | 84°F | 51°F | 96°F 1962 | 33°F 1953 | 18% | |
| May 14 | 84°F | 52°F | 94°F 1960 | 31°F 1953 | 19% | |
| May 15 | 84°F | 52°F | 97°F 1996 | 35°F 1967 | 19% | |
| May 16 | 85°F | 53°F | 100°F 1937 | 36°F 1915 | 19% | |
| May 17 | 85°F | 53°F | 98°F 1934 | 40°F 1986 | 20% | |
| May 18 | 85°F | 53°F | 100°F 1937 | 35°F 1986 | 20% | |
| May 19 | 86°F | 54°F | 100°F 1925 | 35°F 1952 | 20% | |
| May 20 | 86°F | 54°F | 100°F 1996 | 38°F 1960 | 21% | 0% |
| May 21 | 87°F | 55°F | 98°F 2006 | 35°F 1931 | 21% | 0% |
| May 22 | 87°F | 55°F | 98°F 1939 | 39°F 1930 | 21% | 0% |
| May 23 | 87°F | 55°F | 98°F 1996 | 41°F 1963 | 22% | 0% |
| May 24 | 88°F | 56°F | 102°F 2000 | 36°F 1955 | 22% | 0% |
| May 25 | 88°F | 56°F | 103°F 2000 | 43°F 1955 | 22% | 0% |
| May 26 | 88°F | 56°F | 100°F 1943 | 37°F 1955 | 22% | 0% |
| May 27 | 89°F | 57°F | 100°F 1938 | 39°F 1950 | 23% | 0% |
| May 28 | 89°F | 57°F | 101°F 1938 | 41°F 1992 | 23% | 0% |
| May 29 | 89°F | 57°F | 98°F 1916 | 34°F 1947 | 23% | 0% |
| May 30 | 90°F | 58°F | 99°F 1942 | 41°F 1947 | 23% | 0% |
| May 31 | 90°F | 58°F | 99°F 2000 | 42°F 1919 | 23% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MDT).
- May 1
- sunrise 6:04 AM, sunset 7:38 PM
- May 31
- sunrise 5:43 AM, sunset 8:00 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00297008 (Portales), public domain. Records: NOAA GHCN-Daily, station USC00291939, 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 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.