Sammamish Weather Information

Sammamish historical weather data by month.

Chance Of Sunshine

ANNUAL CHANCE OF SUNSHINE 44.84%
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Annual chance of sunshine: 44.84%
Month
% Sunny
Clear Days
Partly Cloudy Days
Cloudy Days
January
25.81%
3
5
23
February
32.14%
3
6
19
March
38.71%
4
8
19
April
46.67%
5
9
16
May
54.84%
7
10
14
June
50.00%
7
8
15
July
70.97%
12
10
9
August
64.52%
10
10
11
September
56.67%
9
8
13
October
41.94%
5
8
18
November
30.00%
3
6
21
December
25.81%
3
5
23

Temperature

JULY HIGH 74.2° - JANUARY LOW 33.1°
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Month
Average
Max Average
Min Average
January
39.4°
45.7°
33.1°
February
41.8°
49.5°
34.1°
March
44.3°
53.2°
35.4°
April
48.4°
58.2°
38.5°
May
53.8°
63.7°
43.9°
June
58.5°
68.3°
48.6°
July
63.1°
74.2°
52°
August
63.7°
75.2°
52.1°
September
58.6°
70°
47.1°
October
50.8°
60°
41.6°
November
43.9°
50.3°
37.4°
December
39.4°
45°
33.8°

Rainfall

Average Annual Rainfall 62.06 inches
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Month
Average Rainfall
January
8.45 Inches
February
6.46 Inches
March
6.18 Inches
April
4.63 Inches
May
3.79 Inches
June
2.94 Inches
July
1.6 Inches
August
1.5 Inches
September
2.8 Inches
October
5.26 Inches
November
9.43 Inches
December
9.02 Inches

Sum Of Heating & Cooling Degree Days

Potential Demand For Energy
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Month
Heating Degree Days
Cooling Degree Days
January
794
0
February
650
0
March
641
0
April
500
0
May
347
0
June
204
8
July
96
37
August
89
46
September
204
10
October
440
0
November
634
0
December
794
0