Weather Averages Arcata, CA

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Weather Averages for
Arcata, CA


Latitude: 40°48'N, Longitude: 124°7'W, Elevation: 59.0 ft, Distance: 4.94 mi

  Unit Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average temperature
over 54 years
°F 53 48 48 48 51 53 55 57 57 57 55 51 48
Average high temperature
over 54 years
°F 57 53 55 55 55 57 60 60 62 62 60 57 55
Average low temperature
over 54 years
°F 46 41 43 43 44 48 51 51 53 51 48 44 42
Highest recorded temperature
over 54 years
°F 87 78 80 75 80 82 84 75 82 86 87 78 77
Lowest recorded temperature
over 54 years
°F 21 26 26 30 34 36 41 46 46 41 32 28 21
Average number of rainy days
over 83 years
days 117 16 14 16 12 8 5 2 3 4 9 13 15
Average precipitation
over 54 years
in 38.0 6.4 5.0 5.2 2.9 1.8 0.6 0.2 0.3 0.8 2.8 5.6 6.4
Average relative humidity
over 12 years
% 85 81 83 81 84 84 87 89 89 87 86 84 84
Average dew point
over 12 years
°F 46 41 42 41 44 46 50 51 51 51 48 44 43
Most recorded rainfall
over 54 years
in 67.2 13.9 10.8 11.2 10.7 6.0 2.6 1.2 3.4 3.3 13.0 16.6 14.1
Least recorded rainfall
over 54 years
in 21.1 0.7 0.1 1.2 0.3 - - - - - - 0.3 0.5
Average number of days with thunderstorms
over 33 years
days 4 1 1 - - - - - - - - 1 1
Average number of days with fog
over 33 years
days 191 13 11 10 12 13 16 22 22 21 21 15 15
Average wind speed
over 54 years
mph 6.8 6.9 7.2 7.6 8.0 7.9 7.4 6.8 5.8 5.5 5.6 6.0 6.4
Average number of days below 32°F
over 12 years
days 4.8 2.3 0.8 0.6 - - - - - - - 0.2 0.9
Average snowfall
over 12 years
in 0.4 0.3 0.1 - - - - - - - - - -
Average number of clear days
over 83 years
days 78 6 5 5 6 6 7 7 5 9 8 6 7
Heating degree days
over 30 years
days 4496 527 440 484 444 378 285 248 223 234 319 399 515
Average possibility of sunshine
over 83 years
% 51 43 46 52 57 58 59 55 50 54 50 44 41
Average number of cloudy days
over 83 years
days 188 19 17 18 16 15 13 13 15 13 15 17 18
Average number of partly cloudy days
over 83 years
days 99 6 6 8 8 10 10 11 11 8 8 7 6
Average number of days below 45°F
over 54 years
days 134 24 19 21 16 7 1 - - 1 7 16 22
Average number of days above 75°F
over 54 years
days 2 - - - - - - - - 1 1 - -