Annual mean 16°C · wettest around December · prevailing wind SW
Warmest
31.7 °C
Coldest
10.8 °C
Wettest
63%
Windiest
3.8 m/s
Prevailing
SW
3.1 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Rocklin over the whole year is 16°C. July is the hottest month, with highs of about 32°C; December is the coldest, with lows of about 6°C. The rainy (wet) season in Rocklin runs from September to May, peaking in December with a 63% chance of rain on a given day. The dry season is June to August; July is the driest month, at 19%. Winds in Rocklin are highest in May, averaging 3.1 m/s (11 km/h), and lightest in November, at 1.9 m/s (7 km/h). The prevailing wind is from the SW. The clearest skies in Rocklin come in July, when the sky is typically 3% covered; January is the cloudiest month, at 42%.
Month by month Rocklin climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
12°C
6°C
9°C
62%
42%
2.5 m/s
8
0
64
February
14°C
6°C
10°C
61%
29%
2.7 m/s
20
0
67
March
15°C
7°C
11°C
61%
38%
2.9 m/s
28
1
72
April
19°C
10°C
16°C
58%
22%
2.8 m/s
60
8
75
May
24°C
13°C
21°C
55%
15%
3.1 m/s
73
24
61
June
29°C
17°C
26°C
32%
5%
3.0 m/s
56
57
28
July
32°C
19°C
29°C
19%
3%
2.9 m/s
33
73
9
August
31°C
18°C
29°C
25%
6%
2.6 m/s
38
74
9
September
28°C
16°C
26°C
46%
9%
2.3 m/s
61
55
30
October
23°C
12°C
20°C
55%
13%
2.1 m/s
74
24
63
November
16°C
8°C
13°C
59%
27%
1.9 m/s
38
0
81
December
12°C
6°C
9°C
63%
39%
2.1 m/s
8
0
64
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Rocklin weather by season
Year round, Rocklin has days of about 12°C at their warmest in December, its coolest month, and 32°C in July, its warmest; the coolest hours of the day run from 6°C to 19°C through the year, and the average temperature over the year is 16°C around the clock. Rain is most likely around December and least likely around July. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Rocklin weather in winterDecember to February
High 12°CLow 6°CRain 62%
Winter in Rocklin has typical daily highs of about 12°C and lows of about 6°C, with a 62% chance of rain on a given day.
Rocklin weather in springMarch to May
High 19°CLow 10°CRain 58%
Spring in Rocklin has typical daily highs of about 19°C and lows of about 10°C, with a 58% chance of rain on a given day.
Rocklin weather in summerJune to August
High 31°CLow 18°CRain 25%
Summer in Rocklin has typical daily highs of about 31°C and lows of about 18°C, with a 25% chance of rain on a given day.
Rocklin weather in autumnSeptember to November
High 22°CLow 12°CRain 53%
Autumn in Rocklin has typical daily highs of about 22°C and lows of about 12°C, with a 53% chance of rain on a given day.
When is the rainy season in Rocklin?
The rainy (wet) season in Rocklin runs from September to May, peaking in December with a 63% chance of rain on a given day. The dry season is June to August; July is the driest month, at 19%.
What time of year is Rocklin windiest?
Winds in Rocklin are highest in May, averaging 3.1 m/s (11 km/h), and lightest in November, at 1.9 m/s (7 km/h). The prevailing wind is from the SW.
What is the average temperature in Rocklin year round?
The average temperature in Rocklin over the whole year is 16°C. July is the hottest month, with highs of about 32°C; December is the coldest, with lows of about 6°C.