Annual mean 12°C · wettest around December · prevailing wind SW
Warmest
22.7 °C
Coldest
4.3 °C
Wettest
38%
Windiest
5.4 m/s
Prevailing
SW
4.1 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 Zemst over the whole year is 12°C. August is the hottest month, with highs of about 22°C; January is the coldest, with lows of about 4°C. Zemst has no sharply defined rainy season: the chance of rain on a given day runs from 19% in May, the driest month, to 32% in December, the wettest. Winds in Zemst are highest in February, averaging 4.2 m/s (15 km/h), and lightest in September, at 2.7 m/s (10 km/h). The prevailing wind is from the SW. The clearest skies in Zemst come in June, when the sky is typically 52% covered; December is the cloudiest month, at 74%.
Month by month Zemst 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
5°C
4°C
1°C
30%
73%
4.0 m/s
0
0
9
February
8°C
4°C
3°C
27%
65%
4.2 m/s
1
0
22
March
10°C
5°C
6°C
24%
62%
3.7 m/s
5
0
39
April
13°C
7°C
9°C
19%
53%
3.3 m/s
18
1
64
May
17°C
11°C
14°C
19%
53%
3.1 m/s
47
3
79
June
21°C
15°C
19°C
20%
52%
3.0 m/s
72
19
66
July
22°C
16°C
20°C
20%
54%
3.0 m/s
78
16
65
August
22°C
16°C
21°C
24%
53%
2.8 m/s
76
22
61
September
19°C
13°C
17°C
24%
53%
2.7 m/s
65
10
74
October
15°C
10°C
12°C
28%
63%
3.2 m/s
28
0
77
November
9°C
6°C
6°C
30%
66%
3.4 m/s
1
0
41
December
7°C
5°C
2°C
32%
74%
3.9 m/s
0
0
17
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 Zemst weather by season
Year round, Zemst has days of about 5°C at their warmest in January, its coolest month, and 22°C in August, 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 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.
Zemst weather in winterDecember to February
High 7°CLow 4°CRain 30%
Winter in Zemst has typical daily highs of about 7°C and lows of about 4°C, with a 30% chance of rain on a given day.
Zemst weather in springMarch to May
High 14°CLow 8°CRain 21%
Spring in Zemst has typical daily highs of about 14°C and lows of about 8°C, with a 21% chance of rain on a given day.
Zemst weather in summerJune to August
High 22°CLow 16°CRain 21%
Summer in Zemst has typical daily highs of about 22°C and lows of about 16°C, with a 21% chance of rain on a given day.
Zemst weather in autumnSeptember to November
High 15°CLow 10°CRain 27%
Autumn in Zemst has typical daily highs of about 15°C and lows of about 10°C, with a 27% chance of rain on a given day.
When is the rainy season in Zemst?
Zemst has no sharply defined rainy season: the chance of rain on a given day runs from 19% in May, the driest month, to 32% in December, the wettest.
What time of year is Zemst windiest?
Winds in Zemst are highest in February, averaging 4.2 m/s (15 km/h), and lightest in September, at 2.7 m/s (10 km/h). The prevailing wind is from the SW.
What is the average temperature in Zemst year round?
The average temperature in Zemst over the whole year is 12°C. August is the hottest month, with highs of about 22°C; January is the coldest, with lows of about 4°C.