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Temperatures | top
Guerneville Links: Average Temperatures | Current Weather |
10-day Forecast
Santa Rosa* Links: 7-Day Forecast
Spring: Daytime temperatures often range from an average of 41.2 degrees F to an average of 73.3 degrees F. May is frequently very warm with temperatures into the 90s.
Summer: In the summer, daytime temperatures usually range from an average of 52 degrees F (on the cooler, foggier mornings) to an average of 89 degrees F. We do have some stretches of hotter weather, up into the high 90s and even a few days in the low 100s. When describing our summer weather, we often say, “It’s hot enough to swim during the day, and cool enough to hot tub at night.”
Autumn: Daytime temperatures usually range from an average of 41 degrees F to an average of 83 degrees F. September is often warm, with temperatures into the 90s, but by October it’s usually cooled down.
Winter: Daytime temperatures usually range from an average of 38 degrees F to an average of 60 degrees F. Sunny days often see higher temperatures, and we do sometimes dip below freezing at night (and wake up to a glittering frost).
*While Santa Rosa is a ½ hour east of Guerneville, this forecast is useful as a predictor of rain in the Russian River area. It is slightly more likely to rain here than in Santa Rosa. In the summer, the forecast can be useful to determine general temperatures for the area. However, there are many micro climates in the hills and valleys of Sonoma County, and the Russian River area tends to be a bit cooler than Santa Rosa.
Rainfall | top
Most rain falls in the winter months, January through March. There is usually less rain in November and December. Rainfall averages about 30 to 70 inches per year depending upon your location. This chart offers complete information on Guerneville rainfall over the last 10 years:
|
Guerneville
Rainfall - inches
|
| Month |
90-91 |
91-92 |
92-93 |
93-94 |
94-95 |
95-96 |
96-97 |
97-98 |
98-99 |
99-00 |
Avg. |
| July |
|
|
1.3 |
|
|
|
|
1.7 |
|
|
0.3 |
| August |
|
|
|
|
|
|
|
|
|
|
0.0 |
| September |
|
|
|
|
|
|
|
0.7 |
0.1 |
0.2 |
0.1 |
| October |
1.6 |
2.6 |
5.6 |
2.6 |
1.4 |
|
1.3 |
2.9 |
1.6 |
2.1 |
2.2 |
| November |
2.0 |
3.9 |
1.5 |
3.7 |
12.0 |
0.8 |
8.7 |
14.2 |
13.9 |
9.5 |
7.0 |
| December |
2.2 |
5.6 |
17.5 |
8.8 |
7.7 |
16.9 |
21.9 |
5.3 |
3.8 |
1.4 |
9.1 |
| January |
|
6.1 |
21.0 |
6.2 |
33.6 |
14.2 |
20.4 |
25.9 |
10.3 |
13.3 |
15.1 |
| February |
6.8 |
16.3 |
11.4 |
9.9 |
0.8 |
15.3 |
0.8 |
27.5 |
19.0 |
21.0 |
12.9 |
| March |
25.0 |
6.6 |
4.2 |
0.4 |
25.0 |
3.7 |
3.7 |
6.9 |
8.1 |
3.7 |
8.7 |
| April |
|
3.0 |
4.3 |
3.2 |
3.3 |
3.3 |
2.4 |
3.5 |
3.8 |
4.5 |
3.1 |
| May |
|
|
3.9 |
1.3 |
5.2 |
4.4 |
0.8 |
8.4 |
0.1 |
2.3 |
2.6 |
| June |
0.7 |
0.3 |
1.9 |
|
1.0 |
|
0.8 |
|
|
0.2 |
0.5 |
| Total |
38.3 |
44.4 |
72.6 |
36.1 |
90.0 |
58.6 |
60.8 |
97.0 |
60.7 |
58.2 |
61.7 |
Flood Information | top
Floods do sometimes happen here in the winter, but major floods are rare. Minor flooding is more common, but does not impact any of our vacation homes or access to the area. Major floods occurred in 1964, 1986, and 1995, with a moderate flood in 1997 and most recently New Year's Eve, 2005. If flood warnings are posted within 3 days of a booking, we allow a full refund, without cancellation fee.
Flood Links:
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