Granby climate

Granby Weather in May

NOAA 1991-2020 normals for Grand Lake 6 Ssw, 12.6 km from Granby

Average highs run from 53°F on May 1 to 66°F on May 31, and lows from 27°F to 35°F. Normal precipitation for the month is 1.62 in over about 12 wet days.

May day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Granby, in °F, with the record for each date.-20020406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

May at a glance

Average high
59°F
Average low
31°F
Precipitation
1.62 in
Snowfall
3.0 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.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
May 153°F27°F72°F 199212°F 196735%11%
May 254°F28°F70°F 2000-1°F 201335%11%
May 354°F28°F70°F 19528°F 201336%10%
May 454°F28°F73°F 200013°F 197336%10%
May 555°F29°F76°F 200414°F 200136%9%
May 655°F29°F75°F 200417°F 198236%9%
May 756°F29°F74°F 200412°F 198436%8%
May 856°F29°F74°F 200414°F 198436%8%
May 956°F30°F73°F 200413°F 200236%7%
May 1057°F30°F71°F 201214°F 199036%7%
May 1157°F30°F72°F 200717°F 197936%6%
May 1258°F31°F73°F 196016°F 199936%6%
May 1358°F31°F74°F 196014°F 200036%5%
May 1459°F31°F73°F 197817°F 201436%5%
May 1559°F31°F75°F 197818°F 197036%5%
May 1659°F32°F73°F 197822°F 199036%4%
May 1760°F32°F76°F 200319°F 195536%4%
May 1860°F32°F73°F 199411°F 199036%4%
May 1961°F32°F76°F 200516°F 199036%3%
May 2061°F33°F81°F 200522°F 196036%3%
May 2162°F33°F81°F 200519°F 200136%3%
May 2262°F33°F80°F 200519°F 197436%3%
May 2362°F33°F79°F 200519°F 200236%3%
May 2463°F33°F76°F 200324°F 200236%2%
May 2563°F34°F76°F 200621°F 201036%2%
May 2664°F34°F75°F 196923°F 195036%2%
May 2764°F34°F78°F 200326°F 198936%2%
May 2864°F34°F83°F 200323°F 195436%2%
May 2965°F35°F84°F 200322°F 195535%2%
May 3065°F35°F86°F 200225°F 197535%2%
May 3166°F35°F81°F 200222°F 201135%2%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Granby, in percent, and of at least 0.1 inch of snowfall.0102030401102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (MDT).

May 1
sunrise 6:03 AM, sunset 7:59 PM
May 31
sunrise 5:37 AM, sunset 8:26 PM

Every day of May: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00053500 (Grand Lake 6 Ssw), 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.