Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, the same as December, is a wintry winter month in Affton, Missouri, with an average temperature varying between 25°F (-3.9°C) and 37.9°F (3.3°C). January is the coldest month, with an average high-temperature of 37.9°F (3.3°C) and an average low-temperature of 25°F (-3.9°C). Weather in January »
Weather in February
February, the last month of the winter in Affton, is another cold month, with an average temperature ranging between max 42.6°F (5.9°C) and min 28.4°F (-2°C). In Affton, the average high-temperature in February is practically the same as in January - a still wintry 42.6°F (5.9°C). Weather in February »
Weather in March
March, the first month of the spring in Affton, is a cool month, with an average temperature fluctuating between 38.1°F (3.4°C) and 54.5°F (12.5°C). In Affton, the average high-temperature in March increases from a wintry 42.6°F (5.9°C) in February to a cool 54.5°F (12.5°C). Weather in March »
Weather in April
April is a comfortable spring month in Affton, Missouri, with temperature in the range of an average low of 48°F (8.9°C) and an average high of 65.7°F (18.7°C). In Affton, the average high-temperature in April increases from a cool 54.5°F (12.5°C) in March to an enjoyable 65.7°F (18.7°C). Weather in April »
Weather in May
The last month of the spring, May, is a warm month in Affton, Missouri, with an average temperature fluctuating between 57.7°F (14.3°C) and 75.4°F (24.1°C). In May, the average high-temperature increases from an enjoyable 65.7°F (18.7°C) in April to a warm 75.4°F (24.1°C). Weather in May »
Weather in June
June, the first month of the summer in Affton, is also a moderately hot month, with temperature in the range of an average low of 66.7°F (19.3°C) and an average high of 84°F (28.9°C). In June, the average high-temperature slightly increases from 75.4°F (24.1°C) in May to a still moderately hot 84°F (28.9°C). Weather in June »
Weather in July
July is a tropical summer month in Affton, Missouri, with temperature in the range of an average high of 86.9°F (30.5°C) and an average low of 69.3°F (20.7°C). The warmest month is July, with an average high-temperature of 86.9°F (30.5°C) and an average low-temperature of 69.3°F (20.7°C). In July, the average heat index is computed to be a torrid 100.4°F (38°C). Weather in July »
Weather in August
August, the last month of the summer in Affton, is another warm month, with an average temperature varying between 66.9°F (19.4°C) and 85.6°F (29.8°C). In August, the average high-temperature is practically the same as in July - a warm 85.6°F (29.8°C). Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Affton, Missouri, with an average temperature fluctuating between 79.7°F (26.5°C) and 59.9°F (15.5°C). In Affton, the average high-temperature in September slightly decreases from 85.6°F (29.8°C) in August to a still warm 79.7°F (26.5°C). Weather in September »
Weather in October
October, like September, in Affton, Missouri, is another comfortable autumn month, with an average temperature varying between 49.1°F (9.5°C) and 66.4°F (19.1°C). In October, the average high-temperature decreases from a warm 79.7°F (26.5°C) in September to a comfortable 66.4°F (19.1°C). Weather in October »
Weather in November
November, the last month of the autumn in Affton, is also a fresh month, with an average temperature fluctuating between 53.8°F (12.1°C) and 37.9°F (3.3°C). In November, the average high-temperature drops from a comfortable 66.4°F (19.1°C) in October to a cool 53.8°F (12.1°C). Weather in November »
Weather in December
The first month of the winter, December, is also a frosty month in Affton, Missouri, with temperature in the range of an average low of 30.7°F (-0.7°C) and an average high of 43.2°F (6.2°C). In Affton, the average high-temperature in December drops from a cool 53.8°F (12.1°C) in November to a chilly 43.2°F (6.2°C). Weather in December »
[Resources]FAQ
What is the coldest month in Affton?
The coldest month is January, with an average high-temperature of 37.9°F (3.3°C) and an average low-temperature of 25°F (-3.9°C).
How many days does it rain in Affton?
Throughout the year, there are 146.1 rainfall days, and 32.36" (822mm) of precipitation is accumulated.
When does it snow in Affton?
Months with snowfall in Affton, Missouri, are January through March, November and December.
How many days does it snow in Affton?
In Affton, Missouri, during the entire year, snow falls for 15.3 days and aggregates up to 8.27" (210mm) of snow.
What is the month with the least sunshine in Affton?
January has the least sunshine of the year in Affton, with an average of 4.5h of sunshine.
When is the lowest UV index in Affton?
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index in Affton.
What is the driest month in Affton?
The months with the least rainfall are February and November Rain falls for 6.8 days and accumulates 1.77" (45mm) of rain.
When does it snow the most in Affton?
The month with the most snowfall is February, when snow falls for 4.8 days and typically aggregates up to 2.6" (66mm) of snow.
When is Daylight Saving Time (DST) in Affton?
On Sunday, March 12. 2023, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 5. 2023, at 2:00 am, and the time zone reverts from CDT to CST.
When it does not snow in Affton?
April through October are months without snowfall in Affton, Missouri.
What is the most humid month in Affton?
May is the most humid month in Affton, Missouri, with an average relative humidity of 78%.
What is the rainiest month in Affton?
The month with the most rainfall in Affton is May, when the rain falls for 16.8 days and typically aggregates up to 3.94" (100mm) of precipitation.
What are the months with the highest UV index in Affton?
May through August, with an average maximum UV index of 6, are months with the highest UV index.
When are the longest days in Affton?
With an average of 14h and 49min of daylight, June has the longest days of the year in Affton, Missouri.
What month has the most sunshine in Affton?
June has the most sunshine of the year, with an average of 10.4h of sunshine.
What is the warmest month in Affton?
The warmest month is July, with an average high-temperature of 86.9°F (30.5°C) and an average low-temperature of 69.3°F (20.7°C).
What is the least humid month in Affton?
The least humid month in Affton, Missouri, is October, with an average relative humidity of 71%.
What is the month with the shortest days in Affton?
The month with the shortest days is December, with an average of 9h and 32min of daylight.
Average temperature
Affton, MO
The warmest month (with the highest average high temperature) is July (86.9°F).
The month with the lowest average high temperature is January (37.9°F).
The month with the highest average low temperature is July (69.3°F).
The coldest month (with the lowest average low temperature) is January (25°F).
Average pressure
Affton, MO
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.94"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Affton, MO
- Average wind speed in January:
9.1mph - Average wind speed in February:
9mph - Average wind speed in March:
8.8mph - Average wind speed in April:
8.8mph - Average wind speed in May:
7.1mph - Average wind speed in June:
6.4mph
- Average wind speed in July:
5.5mph - Average wind speed in August:
5.5mph - Average wind speed in September:
5.9mph - Average wind speed in October:
7.6mph - Average wind speed in November:
8.3mph - Average wind speed in December:
8.5mph
The windiest month (with the highest average wind speed) is January (9.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).
Average humidity
Affton, MO
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Affton, MO
- Average rainfall in January:
1.93" - Average rainfall in February:
1.77" - Average rainfall in March:
2.48" - Average rainfall in April:
3.43" - Average rainfall in May:
3.94" - Average rainfall in June:
3.7"
- Average rainfall in July:
3.27" - Average rainfall in August:
3.39" - Average rainfall in September:
2.13" - Average rainfall in October:
2.36" - Average rainfall in November:
1.77" - Average rainfall in December:
2.2"
The wettest month (with the highest rainfall) is May (3.94").
The driest months (with the least rainfall) are February and November (1.77").
Average rainfall days
Affton, MO
- Average rainfall days in January:
6.8 days - Average rainfall days in February:
6.8 days - Average rainfall days in March:
14.1 days - Average rainfall days in April:
14.7 days - Average rainfall days in May:
16.8 days - Average rainfall days in June:
16 days
- Average rainfall days in July:
16.9 days - Average rainfall days in August:
14.1 days - Average rainfall days in September:
12.6 days - Average rainfall days in October:
9.7 days - Average rainfall days in November:
9.4 days - Average rainfall days in December:
8.2 days
The month with the highest number of rainy days is July (16.9 days).
The months with the least rainy days are January and February (6.8 days).
Average snowfall
Affton, MO
The month with the highest snowfall is February (2.6").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Affton, MO
- Average snowfall days in January:
4.8 days - Average snowfall days in February:
4.8 days - Average snowfall days in March:
1.5 days - Average snowfall days in April:
0.1 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.1 days - Average snowfall days in November:
1 days - Average snowfall days in December:
3 days
The months with the highest number of snowfall days are January and February (4.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Affton, MO
- Average daylight in January:
9h and 50min - Average daylight in February:
10h and 47min - Average daylight in March:
11h and 59min - Average daylight in April:
13h and 14min - Average daylight in May:
14h and 17min - Average daylight in June:
14h and 49min
- Average daylight in July:
14h and 32min - Average daylight in August:
13h and 37min - Average daylight in September:
12h and 25min - Average daylight in October:
11h and 11min - Average daylight in November:
10h and 5min - Average daylight in December:
9h and 32min
The month with the longest days is June (Average daylight: 14h and 49min).
The month with the shortest days is December (Average daylight: 9h and 32min).
- Average sunshine in January:
4h and 30min - Average sunshine in February:
4h and 42min - Average sunshine in March:
6h and 24min - Average sunshine in April:
8h and 24min - Average sunshine in May:
9h and 30min - Average sunshine in June:
10h and 24min
- Average sunshine in July:
10h and 18min - Average sunshine in August:
10h and 12min - Average sunshine in September:
9h and 24min - Average sunshine in October:
6h and 6min - Average sunshine in November:
5h and 30min - Average sunshine in December:
4h and 54min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days
Affton, MO
- Average sunshine days in January:
20.9 days - Average sunshine days in February:
16.8 days - Average sunshine days in March:
14.8 days - Average sunshine days in April:
14 days - Average sunshine days in May:
12.1 days - Average sunshine days in June:
11.6 days
- Average sunshine days in July:
11.8 days - Average sunshine days in August:
14.3 days - Average sunshine days in September:
15.5 days - Average sunshine days in October:
20.5 days - Average sunshine days in November:
18.8 days - Average sunshine days in December:
19.7 days
The month with the most sunshine days is January (20.9 days).
The month with the least sunshine days is June (11.6 days).
Average UV index
Affton, MO
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover
Affton, MO
The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility
Affton, MO
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
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