Annual mean 11°C · wettest around December · prevailing wind SW
Warmest
21.8 °C
Coldest
5.2 °C
Wettest
66%
Windiest
7.9 m/s
Prevailing
SW
6.7 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 Haarlem over the whole year is 11°C. August is the hottest month, with highs of about 21°C; February is the coldest, with lows of about 4°C. The rainy (wet) season in Haarlem runs from October to March, peaking in December with a 62% chance of rain on a given day. The dry season is April to September; May is the driest month, at 32%. Winds in Haarlem are highest in February, averaging 7.2 m/s (26 km/h), and lightest in May, at 5.5 m/s (20 km/h). The prevailing wind is from the SW. The clearest skies in Haarlem come in August, when the sky is typically 44% covered; December is the cloudiest month, at 71%.
Month by month Haarlem 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
0°C
58%
70%
7.0 m/s
0
0
6
February
7°C
4°C
1°C
56%
61%
7.2 m/s
0
0
12
March
9°C
5°C
3°C
51%
53%
6.2 m/s
2
0
25
April
12°C
7°C
7°C
43%
47%
5.8 m/s
9
0
51
May
16°C
11°C
12°C
32%
46%
5.5 m/s
35
2
75
June
19°C
15°C
17°C
32%
46%
5.5 m/s
63
10
74
July
21°C
16°C
18°C
34%
47%
5.5 m/s
70
10
72
August
21°C
17°C
19°C
36%
44%
5.5 m/s
71
14
69
September
19°C
14°C
16°C
44%
48%
5.5 m/s
58
7
76
October
15°C
11°C
10°C
51%
58%
6.5 m/s
17
0
70
November
10°C
7°C
5°C
61%
63%
6.6 m/s
1
0
33
December
7°C
6°C
2°C
62%
71%
7.0 m/s
0
0
12
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 Haarlem weather by season
Year round, Haarlem has days of about 6°C at their warmest in January, its coolest month, and 21°C in August, its warmest; the coolest hours of the day run from 4°C to 17°C through the year, and the average temperature over the year is 11°C around the clock. Rain is most likely around December and least likely around May. 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.
Haarlem weather in winterDecember to February
High 7°CLow 5°CRain 59%
Winter in Haarlem has typical daily highs of about 7°C and lows of about 5°C, with a 59% chance of rain on a given day.
Haarlem weather in springMarch to May
High 13°CLow 7°CRain 42%
Spring in Haarlem has typical daily highs of about 13°C and lows of about 7°C, with a 42% chance of rain on a given day.
Haarlem weather in summerJune to August
High 20°CLow 16°CRain 34%
Summer in Haarlem has typical daily highs of about 20°C and lows of about 16°C, with a 34% chance of rain on a given day.
Haarlem weather in autumnSeptember to November
High 14°CLow 11°CRain 52%
Autumn in Haarlem has typical daily highs of about 14°C and lows of about 11°C, with a 52% chance of rain on a given day.
When is the rainy season in Haarlem?
The rainy (wet) season in Haarlem runs from October to March, peaking in December with a 62% chance of rain on a given day. The dry season is April to September; May is the driest month, at 32%.
What time of year is Haarlem windiest?
Winds in Haarlem are highest in February, averaging 7.2 m/s (26 km/h), and lightest in May, at 5.5 m/s (20 km/h). The prevailing wind is from the SW.
What is the average temperature in Haarlem year round?
The average temperature in Haarlem over the whole year is 11°C. August is the hottest month, with highs of about 21°C; February is the coldest, with lows of about 4°C.