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The tables below display average monthly climate and weather indicators in Eureka California.
Temperature by: Fahrenheit / Centigrade
| Eureka Temperature |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Avg. Temperature |
8.9 |
9.6 |
9.7 |
10.1 |
11.6 |
13.1 |
13.9 |
14.4 |
14.1 |
12.6 |
10.9 |
9.1 |
11.5 |
| Avg. Max Temperature |
12.4 |
13.1 |
13.0 |
13.3 |
14.4 |
15.7 |
16.6 |
17.0 |
17.2 |
16.0 |
14.5 |
12.7 |
14.7 |
| Avg. Min Temperature |
5.3 |
6.1 |
6.3 |
6.8 |
8.6 |
10.3 |
11.3 |
11.7 |
10.9 |
9.2 |
7.3 |
5.6 |
8.3 |
| Days with Max Temp of 32 C or Higher |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
| Days with Min Temp Below Freezing |
2.0 |
1.0 |
< 0.5 |
< 0.5 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
< 0.5 |
< 0.5 |
1.0 |
4.0 |
| | |
| Eureka Heating and Cooling |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Heating Degree Days |
527 |
440 |
484 |
444 |
378 |
285 |
248 |
223 |
234 |
319 |
399 |
515 |
4496 |
| Cooling Degree Days |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
| | |
| Eureka Precipitation |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Precipitation (inches) |
6.0 |
4.7 |
5.3 |
2.9 |
1.4 |
0.5 |
0.1 |
0.5 |
0.9 |
2.7 |
6.4 |
6.0 |
37.5 |
| Days with Precipitation 0.01 inch or More |
16.0 |
14.0 |
16.0 |
12.0 |
9.0 |
5.0 |
2.0 |
3.0 |
5.0 |
9.0 |
13.0 |
16.0 |
119 |
| Monthly Snowfall (inches) |
0.1 |
0.1 |
< 0.05 |
< 0.05 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
< 0.05 |
0.2 |
| | |
| Other Eureka Weather Indicators |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Average Wind Speed |
6.9 |
7.2 |
7.6 |
8.0 |
7.9 |
7.4 |
6.8 |
5.8 |
5.5 |
5.6 |
6.0 |
6.4 |
6.8 |
| Clear Days |
6.0 |
5.0 |
6.0 |
6.0 |
6.0 |
7.0 |
7.0 |
6.0 |
9.0 |
8.0 |
6.0 |
6.0 |
78.0 |
| Partly Cloudy Days |
6.0 |
6.0 |
8.0 |
8.0 |
10.0 |
10.0 |
11.0 |
11.0 |
9.0 |
9.0 |
7.0 |
6.0 |
100.0 |
| Cloudy Days |
19.0 |
17.0 |
18.0 |
16.0 |
15.0 |
13.0 |
14.0 |
15.0 |
13.0 |
14.0 |
17.0 |
18.0 |
188 |
| Percent of Possible Sunshine |
43.0 |
46.0 |
52.0 |
57.0 |
58.0 |
59.0 |
55.0 |
51.0 |
55.0 |
50.0 |
44.0 |
41.0 |
51.0 |
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