Annual mean 13°C · wettest around April · prevailing wind SW
Warmest
29.2 °C
Coldest
0.4 °C
Wettest
41%
Windiest
5.7 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
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 Bethalto over the whole year is 13°C. July is the hottest month, with highs of about 29°C; January is the coldest, with lows of about -2°C. Bethalto has no sharply defined rainy season: the chance of rain on a given day runs from 41% in January, the driest month, to 51% in April, the wettest. Winds in Bethalto are highest in March, averaging 4.2 m/s (15 km/h), and lightest in July, at 2.3 m/s (8 km/h). The prevailing wind is from the SW. The clearest skies in Bethalto come in September, when the sky is typically 32% covered; January is the cloudiest month, at 56%.
Month by month Bethalto 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
1°C
-2°C
-4°C
41%
56%
3.8 m/s
1
0
8
February
5°C
-1°C
-0°C
43%
48%
3.8 m/s
6
0
23
March
11°C
4°C
6°C
47%
51%
4.2 m/s
13
0
40
April
16°C
9°C
12°C
51%
46%
4.1 m/s
37
4
60
May
22°C
15°C
20°C
49%
47%
3.4 m/s
60
26
53
June
28°C
20°C
28°C
46%
33%
2.9 m/s
43
54
17
July
29°C
22°C
31°C
46%
35%
2.3 m/s
20
54
5
August
28°C
20°C
30°C
46%
36%
2.3 m/s
35
54
12
September
26°C
16°C
26°C
42%
32%
2.3 m/s
53
50
30
October
19°C
10°C
16°C
45%
40%
3.1 m/s
47
13
61
November
11°C
4°C
6°C
43%
41%
3.4 m/s
16
1
43
December
5°C
1°C
0°C
42%
50%
3.6 m/s
2
0
20
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 Bethalto weather by season
Year round, Bethalto has days of about 1°C at their warmest in January, its coolest month, and 29°C in July, its warmest; the coolest hours of the day run from -2°C to 22°C through the year, and the average temperature over the year is 13°C around the clock. Rain is most likely around April and least likely around January. 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.
Bethalto weather in winterDecember to February
High 4°CLow -1°CRain 42%
Winter in Bethalto has typical daily highs of about 4°C and lows of about -1°C, with a 42% chance of rain on a given day.
Bethalto weather in springMarch to May
High 17°CLow 9°CRain 49%
Spring in Bethalto has typical daily highs of about 17°C and lows of about 9°C, with a 49% chance of rain on a given day.
Bethalto weather in summerJune to August
High 28°CLow 21°CRain 46%
Summer in Bethalto has typical daily highs of about 28°C and lows of about 21°C, with a 46% chance of rain on a given day.
Bethalto weather in autumnSeptember to November
High 19°CLow 10°CRain 44%
Autumn in Bethalto has typical daily highs of about 19°C and lows of about 10°C, with a 44% chance of rain on a given day.
When is the rainy season in Bethalto?
Bethalto has no sharply defined rainy season: the chance of rain on a given day runs from 41% in January, the driest month, to 51% in April, the wettest.
What time of year is Bethalto windiest?
Winds in Bethalto are highest in March, averaging 4.2 m/s (15 km/h), and lightest in July, at 2.3 m/s (8 km/h). The prevailing wind is from the SW.
What is the average temperature in Bethalto year round?
The average temperature in Bethalto over the whole year is 13°C. July is the hottest month, with highs of about 29°C; January is the coldest, with lows of about -2°C.