Annual mean 17°C · wettest around December · prevailing wind W
Warmest
30.6 °C
Coldest
9.4 °C
Wettest
56%
Windiest
3.6 m/s
Prevailing
W
2.9 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 Jefferson over the whole year is 17°C. July is the hottest month, with highs of about 30°C; January is the coldest, with lows of about 3°C. Jefferson has no sharply defined rainy season: the chance of rain on a given day runs from 35% in October, the driest month, to 52% in December, the wettest. Winds in Jefferson are highest in January, averaging 2.4 m/s (9 km/h), and lightest in August, at 1.4 m/s (5 km/h). The prevailing wind is from the W. The clearest skies in Jefferson come in October, when the sky is typically 27% covered; February is the cloudiest month, at 39%.
Month by month Jefferson 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
10°C
3°C
6°C
51%
33%
2.4 m/s
11
0
40
February
14°C
7°C
10°C
47%
39%
2.3 m/s
30
1
60
March
17°C
8°C
14°C
49%
32%
2.4 m/s
47
4
71
April
21°C
12°C
19°C
49%
27%
2.2 m/s
66
18
63
May
25°C
17°C
24°C
50%
34%
2.0 m/s
61
48
34
June
29°C
21°C
30°C
44%
31%
1.8 m/s
27
64
6
July
30°C
23°C
33°C
48%
29%
1.5 m/s
6
48
0
August
29°C
22°C
32°C
48%
34%
1.4 m/s
13
54
2
September
27°C
19°C
28°C
38%
30%
1.5 m/s
38
56
17
October
23°C
13°C
22°C
35%
27%
1.7 m/s
70
29
53
November
16°C
8°C
14°C
44%
29%
2.0 m/s
43
5
70
December
11°C
5°C
8°C
52%
36%
2.2 m/s
17
0
54
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 Jefferson weather by season
Year round, Jefferson has days of about 10°C at their warmest in January, its coolest month, and 30°C in July, its warmest; the coolest hours of the day run from 3°C to 23°C through the year, and the average temperature over the year is 17°C around the clock. Rain is most likely around December and least likely around October. 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.
Jefferson weather in winterDecember to February
High 12°CLow 5°CRain 50%
Winter in Jefferson has typical daily highs of about 12°C and lows of about 5°C, with a 50% chance of rain on a given day.
Jefferson weather in springMarch to May
High 21°CLow 12°CRain 49%
Spring in Jefferson has typical daily highs of about 21°C and lows of about 12°C, with a 49% chance of rain on a given day.
Jefferson weather in summerJune to August
High 29°CLow 22°CRain 47%
Summer in Jefferson has typical daily highs of about 29°C and lows of about 22°C, with a 47% chance of rain on a given day.
Jefferson weather in autumnSeptember to November
High 22°CLow 13°CRain 39%
Autumn in Jefferson has typical daily highs of about 22°C and lows of about 13°C, with a 39% chance of rain on a given day.
When is the rainy season in Jefferson?
Jefferson has no sharply defined rainy season: the chance of rain on a given day runs from 35% in October, the driest month, to 52% in December, the wettest.
What time of year is Jefferson windiest?
Winds in Jefferson are highest in January, averaging 2.4 m/s (9 km/h), and lightest in August, at 1.4 m/s (5 km/h). The prevailing wind is from the W.
What is the average temperature in Jefferson year round?
The average temperature in Jefferson over the whole year is 17°C. July is the hottest month, with highs of about 30°C; January is the coldest, with lows of about 3°C.