Monticello climate

Monticello Weather in May

NOAA 1991-2020 normals for Monticello 2E, 3.1 km from Monticello

Average highs run from 63°F on May 1 to 75°F on May 31, and lows from 35°F to 43°F. Normal precipitation for the month is 0.89 in over about 5 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 Monticello, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

May at a glance

Average high
69°F
Average low
39°F
Precipitation
0.89 in
Snowfall
1.1 in
Record high
84°FMay 10, 2018
Record low
23°FMay 9, 2024
Chance of a freeze
92%
Daylight
13 h 47 min to 14 h 36 min
Cloud cover
48%
Humidity
42%
Dew point
29°F
Wind
9.2 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 163°F35°F77°F 201328°F 201617%4%
May 264°F35°F78°F 202128°F 201317%4%
May 364°F36°F75°F 201531°F 201317%4%
May 464°F36°F75°F 201426°F 202217%4%
May 565°F36°F74°F 201431°F 202217%3%
May 665°F36°F78°F 201725°F 202417%3%
May 765°F37°F79°F 202128°F 201417%3%
May 866°F37°F78°F 201825°F 202417%3%
May 966°F37°F82°F 201823°F 202417%3%
May 1067°F37°F84°F 201828°F 201517%3%
May 1167°F38°F81°F 201830°F 201517%2%
May 1267°F38°F78°F 202628°F 201417%2%
May 1368°F38°F84°F 202627°F 201417%2%
May 1468°F38°F80°F 202626°F 201417%2%
May 1569°F39°F81°F 201329°F 202517%2%
May 1669°F39°F83°F 202231°F 201517%2%
May 1769°F39°F79°F 202232°F 201517%2%
May 1870°F39°F81°F 202224°F 201717%2%
May 1970°F40°F78°F 202026°F 201717%1%
May 2071°F40°F79°F 202227°F 202517%1%
May 2171°F40°F75°F 201228°F 201917%1%
May 2272°F40°F80°F 201228°F 201917%1%
May 2372°F41°F81°F 201229°F 202117%1%
May 2472°F41°F79°F 202532°F 201916%1%
May 2573°F41°F79°F 201732°F 201916%1%
May 2673°F41°F77°F 201336°F 202416%1%
May 2774°F42°F82°F 202230°F 201216%1%
May 2874°F42°F83°F 202229°F 201216%1%
May 2975°F42°F83°F 201429°F 201216%1%
May 3075°F42°F82°F 202033°F 202215%1%
May 3175°F43°F83°F 202533°F 202215%1%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Monticello, in percent, and of at least 0.1 inch of snowfall.051015201102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (MDT).

May 1
sunrise 6:21 AM, sunset 8:08 PM
May 31
sunrise 5:57 AM, sunset 8:33 PM

Every day of May: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00425805 (Monticello 2E), public domain. Records: NOAA GHCN-Daily, station USC00425807, 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.