Annual mean 11°C · wettest around December · prevailing wind SW
Warmest
21.6 °C
Coldest
5.3 °C
Wettest
65%
Windiest
8.3 m/s
Prevailing
SW
7.0 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 Heemskerk 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 Heemskerk runs from October to March, peaking in December with a 63% chance of rain on a given day. The dry season is April to September; May is the driest month, at 32%. Winds in Heemskerk are highest in February, averaging 7.6 m/s (27 km/h), and lightest in May, at 5.8 m/s (21 km/h). The prevailing wind is from the SW. The clearest skies in Heemskerk come in August, when the sky is typically 47% covered; December is the cloudiest month, at 72%.
Month by month Heemskerk 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%
7.5 m/s
0
0
6
February
7°C
4°C
0°C
56%
62%
7.6 m/s
0
0
11
March
9°C
5°C
3°C
51%
55%
6.6 m/s
2
0
23
April
12°C
7°C
7°C
43%
51%
6.2 m/s
8
0
49
May
16°C
11°C
12°C
32%
49%
5.8 m/s
33
1
74
June
19°C
14°C
16°C
32%
48%
5.9 m/s
61
9
76
July
20°C
16°C
18°C
34%
50%
5.8 m/s
69
9
74
August
21°C
17°C
19°C
37%
47%
5.9 m/s
70
13
70
September
19°C
14°C
16°C
44%
50%
5.9 m/s
56
6
77
October
15°C
11°C
10°C
51%
60%
7.0 m/s
15
0
69
November
10°C
7°C
4°C
62%
64%
7.1 m/s
0
0
32
December
7°C
6°C
1°C
63%
72%
7.5 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 Heemskerk weather by season
Year round, Heemskerk 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.
Heemskerk weather in winterDecember to February
High 7°CLow 5°CRain 59%
Winter in Heemskerk has typical daily highs of about 7°C and lows of about 5°C, with a 59% chance of rain on a given day.
Heemskerk weather in springMarch to May
High 12°CLow 7°CRain 42%
Spring in Heemskerk has typical daily highs of about 12°C and lows of about 7°C, with a 42% chance of rain on a given day.
Heemskerk weather in summerJune to August
High 20°CLow 16°CRain 34%
Summer in Heemskerk has typical daily highs of about 20°C and lows of about 16°C, with a 34% chance of rain on a given day.
Heemskerk weather in autumnSeptember to November
High 14°CLow 11°CRain 52%
Autumn in Heemskerk 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 Heemskerk?
The rainy (wet) season in Heemskerk runs from October to March, peaking in December with a 63% 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 Heemskerk windiest?
Winds in Heemskerk are highest in February, averaging 7.6 m/s (27 km/h), and lightest in May, at 5.8 m/s (21 km/h). The prevailing wind is from the SW.
What is the average temperature in Heemskerk year round?
The average temperature in Heemskerk 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.