Modoc County climate

Modoc County Weather in May

NOAA 1991-2020 normals for Alturas Muni AP, 17.3 km from Modoc County

Average highs run from 63°F on May 1 to 72°F on May 31, and lows from 34°F to 40°F. Normal precipitation for the month is 1.26 in over about 9 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 Modoc County, in °F, with the record for each date.020406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

May at a glance

Average high
68°F
Average low
37°F
Precipitation
1.26 in
Record high
93°FMay 29, 2020
Record low
14°FMay 6, 2010
Chance of a freeze
99%
Days of 90°F or more
0.5
Daylight
14 h 02 min to 14 h 58 min
Cloud cover
57%
Humidity
60%
Dew point
35°F
Wind
8.5 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation.

DateNormal highNormal lowRecord highRecord lowChance wet
May 163°F34°F83°F 201417°F 200831%
May 264°F34°F82°F 200421°F 201331%
May 364°F34°F83°F 200423°F 202430%
May 464°F34°F84°F 201722°F 201030%
May 565°F35°F81°F 202123°F 199930%
May 665°F35°F79°F 202614°F 201030%
May 765°F35°F83°F 200119°F 201029%
May 866°F36°F83°F 200119°F 202229%
May 966°F36°F85°F 202014°F 202229%
May 1066°F36°F86°F 202625°F 201429%
May 1167°F36°F89°F 200121°F 200029%
May 1267°F37°F88°F 202623°F 200029%
May 1367°F37°F83°F 201224°F 200928%
May 1468°F37°F84°F 200625°F 199928%
May 1568°F37°F87°F 200626°F 199928%
May 1668°F38°F90°F 200819°F 199928%
May 1768°F38°F92°F 200828°F 200128%
May 1869°F38°F90°F 200828°F 201228%
May 1969°F38°F88°F 200827°F 202628%
May 2069°F38°F86°F 202330°F 200327%
May 2169°F39°F86°F 200026°F 202227%
May 2270°F39°F90°F 200124°F 201027%
May 2370°F39°F91°F 200125°F 202027%
May 2470°F39°F90°F 200124°F 201326%
May 2571°F39°F86°F 200128°F 201026%
May 2671°F39°F84°F 200129°F 202126%
May 2771°F39°F90°F 200332°F 202125%
May 2871°F40°F91°F 202028°F 200725%
May 2972°F40°F93°F 202026°F 200624%
May 3072°F40°F92°F 202529°F 200624%
May 3172°F40°F93°F 200126°F 202224%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Modoc County, in percent.0102030401102030
  • Chance of a wet day

Sunrise and sunset

Times for 2026, local time (PDT).

May 1
sunrise 5:59 AM, sunset 8:01 PM
May 31
sunrise 5:32 AM, sunset 8:30 PM

Every day of May: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00094299 (Alturas Muni AP), public domain. Records: NOAA GHCN-Daily, station USW00094299, 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.