San Juan County Weather in May
Average highs run from 65°F on May 1 to 78°F on May 31, and lows from 39°F to 49°F. Normal precipitation for the month is 0.86 in over about 5 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
- 71°F
- Average low
- 44°F
- Precipitation
- 0.86 in
- Snowfall
- 0.2 in
- Record high
- 98°FMay 31, 2002
- Record low
- 14°FMay 14, 2025
- Chance of a freeze
- 63%
- Daylight
- 13 h 46 min to 14 h 35 min
- Cloud cover
- 46%
- Humidity
- 34%
- Dew point
- 28°F
- Wind
- 8.9 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 | 65°F | 39°F | 83°F 1981 | 20°F 1909 | 16% | 1% |
| May 2 | 65°F | 39°F | 87°F 1947 | 22°F 1915 | 16% | 1% |
| May 3 | 66°F | 40°F | 88°F 1947 | 24°F 1907 | 16% | 1% |
| May 4 | 66°F | 40°F | 91°F 1947 | 26°F 1912 | 16% | 1% |
| May 5 | 66°F | 40°F | 90°F 1947 | 25°F 1950 | 16% | 1% |
| May 6 | 67°F | 41°F | 84°F 1947 | 23°F 1975 | 16% | 1% |
| May 7 | 67°F | 41°F | 86°F 1996 | 23°F 1975 | 16% | 1% |
| May 8 | 68°F | 41°F | 85°F 2018 | 25°F 1908 | 16% | 1% |
| May 9 | 68°F | 42°F | 86°F 2018 | 25°F 1930 | 16% | 1% |
| May 10 | 68°F | 42°F | 85°F 2000 | 18°F 1905 | 16% | 1% |
| May 11 | 69°F | 42°F | 88°F 1996 | 25°F 1953 | 16% | 1% |
| May 12 | 69°F | 43°F | 92°F 1996 | 23°F 1933 | 16% | 1% |
| May 13 | 70°F | 43°F | 92°F 1996 | 25°F 1933 | 16% | 1% |
| May 14 | 70°F | 43°F | 89°F 1996 | 14°F 2025 | 15% | 1% |
| May 15 | 71°F | 44°F | 89°F 2022 | 24°F 1909 | 15% | 0% |
| May 16 | 71°F | 44°F | 88°F 1997 | 15°F 1910 | 15% | 0% |
| May 17 | 71°F | 44°F | 88°F 1997 | 25°F 1910 | 15% | 0% |
| May 18 | 72°F | 45°F | 90°F 2006 | 27°F 1977 | 15% | 0% |
| May 19 | 72°F | 45°F | 90°F 2008 | 27°F 1977 | 15% | 0% |
| May 20 | 73°F | 45°F | 93°F 2008 | 27°F 1931 | 14% | 0% |
| May 21 | 73°F | 46°F | 90°F 2005 | 28°F 1931 | 14% | 0% |
| May 22 | 74°F | 46°F | 92°F 2005 | 28°F 1909 | 14% | 0% |
| May 23 | 74°F | 46°F | 94°F 2000 | 26°F 1909 | 14% | 0% |
| May 24 | 75°F | 47°F | 92°F 2000 | 25°F 1909 | 13% | 0% |
| May 25 | 75°F | 47°F | 92°F 2006 | 26°F 1980 | 13% | 0% |
| May 26 | 75°F | 47°F | 91°F 2001 | 28°F 1950 | 13% | 0% |
| May 27 | 76°F | 48°F | 93°F 2003 | 32°F 1929 | 12% | 0% |
| May 28 | 76°F | 48°F | 94°F 2000 | 33°F 1931 | 12% | 0% |
| May 29 | 77°F | 48°F | 97°F 2000 | 29°F 1953 | 12% | 0% |
| May 30 | 77°F | 49°F | 96°F 2002 | 30°F 1905 | 11% | 0% |
| May 31 | 78°F | 49°F | 98°F 2002 | 32°F 1979 | 11% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MDT).
- May 1
- sunrise 6:24 AM, sunset 8:10 PM
- May 31
- sunrise 6:00 AM, sunset 8:35 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00426053 (Natural Bridges Nm), public domain. Records: NOAA GHCN-Daily, station USC00420738, 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.