Grand County Weather in May
Average highs run from 57°F on May 1 to 68°F on May 31, and lows from 28°F to 35°F. Normal precipitation for the month is 1.53 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
- 62°F
- Average low
- 32°F
- Precipitation
- 1.53 in
- Snowfall
- 2.7 in
- Record high
- 86°FMay 30, 2002
- Record low
- -1°FMay 2, 2013
- Chance of a freeze
- 100%
- Daylight
- 13 h 56 min to 14 h 49 min
- Cloud cover
- 70%
- Humidity
- 65%
- Dew point
- 29°F
- Wind
- 5.1 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 | 57°F | 28°F | 72°F 1992 | 12°F 1967 | 32% | 11% |
| May 2 | 57°F | 28°F | 70°F 2000 | -1°F 2013 | 32% | 11% |
| May 3 | 57°F | 28°F | 70°F 1952 | 8°F 2013 | 32% | 10% |
| May 4 | 58°F | 28°F | 73°F 2000 | 13°F 1973 | 32% | 10% |
| May 5 | 58°F | 29°F | 76°F 2004 | 14°F 2001 | 32% | 9% |
| May 6 | 58°F | 29°F | 75°F 2004 | 17°F 1982 | 32% | 9% |
| May 7 | 59°F | 29°F | 74°F 2004 | 12°F 1984 | 32% | 9% |
| May 8 | 59°F | 30°F | 74°F 2004 | 14°F 1984 | 32% | 8% |
| May 9 | 59°F | 30°F | 73°F 2004 | 13°F 2002 | 32% | 8% |
| May 10 | 60°F | 30°F | 71°F 2012 | 14°F 1990 | 31% | 7% |
| May 11 | 60°F | 31°F | 72°F 2007 | 17°F 1979 | 31% | 7% |
| May 12 | 61°F | 31°F | 73°F 1960 | 16°F 1999 | 31% | 7% |
| May 13 | 61°F | 31°F | 74°F 1960 | 14°F 2000 | 31% | 6% |
| May 14 | 61°F | 31°F | 73°F 1978 | 17°F 2014 | 31% | 6% |
| May 15 | 62°F | 32°F | 75°F 1978 | 18°F 1970 | 31% | 5% |
| May 16 | 62°F | 32°F | 73°F 1978 | 22°F 1990 | 31% | 5% |
| May 17 | 62°F | 32°F | 76°F 2003 | 19°F 1955 | 31% | 5% |
| May 18 | 63°F | 32°F | 73°F 1994 | 11°F 1990 | 31% | 4% |
| May 19 | 63°F | 33°F | 76°F 2005 | 16°F 1990 | 30% | 4% |
| May 20 | 64°F | 33°F | 81°F 2005 | 22°F 1960 | 30% | 4% |
| May 21 | 64°F | 33°F | 81°F 2005 | 19°F 2001 | 30% | 4% |
| May 22 | 64°F | 33°F | 80°F 2005 | 19°F 1974 | 30% | 3% |
| May 23 | 65°F | 34°F | 79°F 2005 | 19°F 2002 | 30% | 3% |
| May 24 | 65°F | 34°F | 76°F 2003 | 24°F 2002 | 30% | 3% |
| May 25 | 66°F | 34°F | 76°F 2006 | 21°F 2010 | 30% | 3% |
| May 26 | 66°F | 34°F | 75°F 1969 | 23°F 1950 | 29% | 2% |
| May 27 | 66°F | 35°F | 78°F 2003 | 26°F 1989 | 29% | 2% |
| May 28 | 67°F | 35°F | 83°F 2003 | 23°F 1954 | 29% | 2% |
| May 29 | 67°F | 35°F | 84°F 2003 | 22°F 1955 | 29% | 2% |
| May 30 | 68°F | 35°F | 86°F 2002 | 25°F 1975 | 28% | 2% |
| May 31 | 68°F | 35°F | 81°F 2002 | 22°F 2011 | 28% | 2% |
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 8:00 PM
- May 31
- sunrise 5:38 AM, sunset 8:27 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00059096 (Williams Fork Dam), public domain. Records: NOAA GHCN-Daily, station USC00053500, 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.