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Humboldt County, CA

: September 2026 so far averaged 60.7°F in Humboldt County, CA, the coldest 1 to 29 September in the county average since 1986, 2nd coldest of 76 (county average from NOAA gridded data, 1951 to 2026).

Last updated . This page normally updates every day; the latest update is late.

High
73.4°F
Coldest since 2025
33rd coldest of 76
Low
45.2°F
Coldest since 2021
11th coldest of 76

No measurable precipitation in the county average of Humboldt County, CA for 4 days to Tuesday 29 September 2026 (county average from NOAA gridded data, 1951 to 2026).

Every 29 September low of the county average in Humboldt County, CA since 1951: 45.2°F in 2026; the lowest is 40.2°F, in 2007.
2021: 41.6°F2007: 40.2°F2026: 45.2°F 2026 45.2°F 2007 40.2°F since 2021 1951 2026
  • Normal range, 45.1 to 54.4°F
Every year as a table

Every 29 September high of the county average in Humboldt County, CA since 1951: 73.4°F in 2026; the highest is 93.7°F, in 2020.

YearHigh, °FLow, °F
202673.445.2
202569.150.4
20248351.5
202367.446.1
202267.348.8
202159.641.6
202093.761.8
201955.943.4
201879.949.8
201781.250.7
201681.354.4
201580.352.2
201474.250.9
201369.248.3
201286.854.3
201181.650.3
201087.358.6
200972.245.3
200889.754.5
200757.740.2
20067953.5
200581.451.3
200475.151
200377.749.5
200272.645.9
200172.242.7
200073.847.7
199979.547.1
199869.448.2
199784.253.8
199681.353.6
199562.746.6
199469.849.5
199375.252.2
199286.452.6
199179.750.7
199081.158.1
198974.749
198880.548.5
198784.350.9
198665.644.4
198573.950.6
19848347.6
198369.748.4
198264.946.9
198163.447.5
198076.751.4
197978.453.3
197873.550.3
197765.153.6
197673.353.4
197573.247.8
197476.746.2
197379.350.5
197269.250.8
197157.849.6
197077.146.9
196977.652
196881.146.8
196781.551.9
196689.351.2
196565.643.9
196472.448.3
196377.851.1
196256.451.5
196169.342.3
196077.151.2
195968.243
195885.251.5
19576155.1
19567548.1
195568.544.8
195467.743.3
195367.746.7
195281.251.5
195160.554.4

The month

August 2026 averaged 69.5°F in Humboldt County, CA, the warmest August in the county average since 2025, 7th warmest of 132 (county average from NOAA's monthly county data, 1895 to 2026).

The month in words
  • Tuesday 29 September 2026: a high of 73.4°F averaged over Humboldt County, CA, the coldest 29 September day in the county average since 2025, 33rd coldest of 76 (county average from NOAA gridded data, 1951 to 2026).
  • Tuesday 29 September 2026: a low of 45.2°F averaged over Humboldt County, CA, the coldest 29 September night in the county average since 2021, 11th coldest of 76 (county average from NOAA gridded data, 1951 to 2026).
Days of the month without a value
0

Nearby

Eureka, CA 14.2 mi, the nearest city with its own station