Arco climate

Arco Weather in May

NOAA 1991-2020 normals for Arco, 0.2 km from Arco

Average highs run from 62°F on May 1 to 71°F on May 31, and lows from 34°F to 43°F. Normal precipitation for the month is 1.20 in over about 6 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 Arco, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

May at a glance

Average high
67°F
Average low
39°F
Precipitation
1.20 in
Snowfall
0.2 in
Record high
91°FMay 29, 2020
Record low
22°FMay 3, 2019
Chance of a freeze
95%
Daylight
14 h 11 min to 15 h 12 min
Cloud cover
61%
Humidity
56%
Dew point
32°F
Wind
8.3 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 162°F34°F80°F 202326°F 201918%1%
May 263°F34°F80°F 202326°F 202418%1%
May 363°F35°F77°F 202522°F 201918%1%
May 463°F35°F78°F 201729°F 202018%1%
May 564°F35°F79°F 201731°F 202318%1%
May 664°F36°F80°F 201828°F 202318%1%
May 764°F36°F75°F 202627°F 202319%1%
May 865°F36°F76°F 201823°F 202219%1%
May 965°F37°F78°F 202527°F 202119%1%
May 1065°F37°F83°F 202525°F 201919%1%
May 1166°F37°F81°F 202529°F 202119%1%
May 1266°F38°F86°F 202631°F 202319%1%
May 1366°F38°F87°F 202634°F 202019%1%
May 1467°F38°F78°F 201931°F 201720%1%
May 1567°F38°F73°F 202232°F 202520%1%
May 1667°F39°F78°F 202130°F 201720%1%
May 1767°F39°F79°F 202131°F 202620%1%
May 1868°F39°F74°F 201631°F 202420%1%
May 1968°F40°F79°F 202331°F 202620%0%
May 2068°F40°F78°F 202331°F 202420%0%
May 2169°F40°F78°F 202332°F 202220%0%
May 2269°F41°F76°F 202332°F 201620%0%
May 2369°F41°F79°F 202627°F 202420%0%
May 2469°F41°F81°F 202631°F 202420%0%
May 2570°F41°F81°F 201835°F 202320%0%
May 2670°F42°F82°F 202533°F 202420%0%
May 2770°F42°F81°F 202539°F 201720%0%
May 2871°F42°F84°F 202037°F 201619%0%
May 2971°F42°F91°F 202038°F 202119%0%
May 3071°F43°F87°F 202034°F 202419%0%
May 3171°F43°F89°F 202539°F 202419%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Arco, 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 6:25 AM, sunset 8:36 PM
May 31
sunrise 5:55 AM, sunset 9:07 PM

Every day of May: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00100375 (Arco), public domain. Records: NOAA GHCN-Daily, station USC00100774, 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.