Annual mean 12°C · wettest around December · prevailing wind SW
Warmest
22.1 °C
Coldest
5.8 °C
Wettest
30%
Windiest
5.2 m/s
Prevailing
SW
4.4 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
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 Harlow over the whole year is 12°C. July is the hottest month, with highs of about 22°C; January is the coldest, with lows of about 4°C. Harlow has no sharply defined rainy season: the chance of rain on a given day runs from 14% in April, the driest month, to 25% in December, the wettest. Winds in Harlow are highest in February, averaging 4.3 m/s (15 km/h), and lightest in September, at 3.4 m/s (12 km/h). The prevailing wind is from the SW. The clearest skies in Harlow come in July, when the sky is typically 42% covered; December is the cloudiest month, at 63%.
Month by month Harlow 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
6°C
4°C
2°C
21%
58%
3.9 m/s
0
0
15
February
8°C
5°C
3°C
22%
56%
4.3 m/s
1
0
25
March
10°C
5°C
5°C
22%
56%
4.0 m/s
2
0
38
April
13°C
7°C
9°C
14%
43%
3.6 m/s
12
1
58
May
16°C
11°C
13°C
18%
44%
3.5 m/s
37
1
77
June
20°C
14°C
18°C
16%
44%
3.5 m/s
65
11
73
July
22°C
16°C
19°C
17%
42%
3.5 m/s
76
15
69
August
21°C
15°C
19°C
17%
42%
3.5 m/s
76
12
72
September
19°C
13°C
16°C
19%
44%
3.4 m/s
61
6
78
October
15°C
11°C
12°C
23%
50%
3.5 m/s
23
0
78
November
10°C
7°C
6°C
22%
56%
3.6 m/s
1
0
45
December
8°C
6°C
4°C
25%
63%
3.9 m/s
0
0
26
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 Harlow weather by season
Year round, Harlow has days of about 6°C at their warmest in January, its coolest month, and 22°C in July, its warmest; the coolest hours of the day run from 4°C to 16°C through the year, and the average temperature over the year is 12°C around the clock. Rain is most likely around December and least likely around April. 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.
Harlow weather in winterDecember to February
High 7°CLow 5°CRain 23%
Winter in Harlow has typical daily highs of about 7°C and lows of about 5°C, with a 23% chance of rain on a given day.
Harlow weather in springMarch to May
High 13°CLow 7°CRain 18%
Spring in Harlow has typical daily highs of about 13°C and lows of about 7°C, with a 18% chance of rain on a given day.
Harlow weather in summerJune to August
High 21°CLow 15°CRain 17%
Summer in Harlow has typical daily highs of about 21°C and lows of about 15°C, with a 17% chance of rain on a given day.
Harlow weather in autumnSeptember to November
High 14°CLow 10°CRain 21%
Autumn in Harlow has typical daily highs of about 14°C and lows of about 10°C, with a 21% chance of rain on a given day.
When is the rainy season in Harlow?
Harlow has no sharply defined rainy season: the chance of rain on a given day runs from 14% in April, the driest month, to 25% in December, the wettest.
What time of year is Harlow windiest?
Winds in Harlow are highest in February, averaging 4.3 m/s (15 km/h), and lightest in September, at 3.4 m/s (12 km/h). The prevailing wind is from the SW.
What is the average temperature in Harlow year round?
The average temperature in Harlow over the whole year is 12°C. July is the hottest month, with highs of about 22°C; January is the coldest, with lows of about 4°C.