Climate and monthly weather forecastWilliamstown, MO
Climate and monthly weather forecast
Weather in January
January, the same as December, in Williamstown, Missouri, is a freezing cold winter month, with temperature in the range of an average low of 18.9°F (-7.3°C) and an average high of 31.6°F (-0.2°C). The coldest period tends to be January, when average temperatures fluctuate between a high of 31.6°F (-0.2°C) and a low of 18.9°F (-7.3°C). Weather in January »Weather in February
February, the last month of the winter in Williamstown, is a wintry month, with an average temperature varying between 36.1°F (2.3°C) and 22.6°F (-5.2°C). With the arrival of February, Williamstown's average high-temperature registers at an icy 36.1°F (2.3°C), indicating a subtle variation from the previous month. Weather in February »Weather in March
March, the first month of the spring in Williamstown, is a chilly month, with an average temperature varying between 34.5°F (1.4°C) and 49.6°F (9.8°C). Williamstown's transition into March is marked by a temperature shift, moving from a wintry 36.1°F (2.3°C) in February to a frosty 49.6°F (9.8°C). Weather in March »Weather in April
April is an enjoyable spring month in Williamstown, Missouri, with an average temperature ranging between min 44.2°F (6.8°C) and max 61.9°F (16.6°C). April's arrival coincides with a temperature rise, moving from March's chilly 49.6°F (9.8°C) to a comfortable 61.9°F (16.6°C). Weather in April »Weather in May
May, the last month of the spring in Williamstown, is a pleasant month, with an average temperature fluctuating between 54.3°F (12.4°C) and 71.2°F (21.8°C). The arrival of May brings an increase in high-temperatures, moving from an enjoyable 61.9°F (16.6°C) in April to a pleasant 71.2°F (21.8°C). Weather in May »Weather in June
The first month of the summer, June, is a moderately hot month in Williamstown, Missouri, with an average temperature varying between 63.7°F (17.6°C) and 80.8°F (27.1°C). The shift from May to June brings an increase in the average high-temperature, moving from a pleasant 71.2°F (21.8°C) to a warm 80.8°F (27.1°C). Weather in June »Weather in July
July, the same as June, is a moderately hot summer month in Williamstown, Missouri, with an average temperature varying between 83.3°F (28.5°C) and 66.6°F (19.2°C). In Williamstown, the peak temperatures are generally noted in July, averaging a high of 83.3°F (28.5°C) and a low of 66.6°F (19.2°C). The heat index for July is appraised at a hot 93.2°F (34°C). Weather in July »Weather in August
The last month of the summer, August, is another warm month in Williamstown, Missouri, with an average temperature varying between 64°F (17.8°C) and 82.8°F (28.2°C). Transitioning from July to August, Williamstown observes an average high-temperature of a still moderately hot 82.8°F (28.2°C), differing subtly from the previous month. Weather in August »Weather in September
The first month of the autumn, September, is also a moderately hot month in Williamstown, Missouri, with temperature in the range of an average low of 57.6°F (14.2°C) and an average high of 77.4°F (25.2°C). As August shifts into September, a minor alteration in temperatures is observed, with average highs reducing from 82.8°F (28.2°C) to a still warm 77.4°F (25.2°C). Weather in September »Weather in October
October, like September, in Williamstown, Missouri, is another refreshing autumn month, with an average temperature ranging between min 46°F (7.8°C) and max 63.3°F (17.4°C). The average high-temperature decreases in October, shifting from a moderately hot 77.4°F (25.2°C) in September to an enjoyable 63.3°F (17.4°C). Weather in October »Weather in November
The last month of the autumn, November, is another chilly month in Williamstown, Missouri, with an average temperature varying between 49.5°F (9.7°C) and 34.7°F (1.5°C). November implies a gentle temperature shift, with average high-temperatures reducing from October's refreshing 63.3°F (17.4°C) to a chilly 49.5°F (9.7°C). Weather in November »Weather in December
December, the first month of the winter in Williamstown, is also a wintry month, with an average temperature fluctuating between 25.7°F (-3.5°C) and 37.6°F (3.1°C). The shift to December brings a decrease in the average high-temperature, falling from a chilly 49.5°F (9.7°C) in November to a cold 37.6°F (3.1°C). Weather in December »Updated: Aug 7, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Temperature records mark January as the coldest month, with highs averaging 31.6°F (-0.2°C) and lows at 18.9°F (-7.3°C).
January is the month with the least rainfall in Williamstown. Rain falls for 4.8 days and accumulates 1.22" (31mm) of precipitation.
Throughout the year, there are 134.4 rainfall days, and 27.44" (697mm) of precipitation is accumulated.
January through April, October through December are months with snowfall.
The month with the most snowfall is January, when snow falls for 7.4 days and typically aggregates up to 3.98" (101mm) of snow.
Throughout the year, there are 24.7 snowfall days, and 11.69" (297mm) of snow is accumulated.
With an average of 4.3h of sunshine, January has the least sunshine of the year.
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.
May is the month with the most rainfall. Rain falls for 17.6 days and accumulates 3.7" (94mm) of precipitation.
May through September are months without snowfall.
The months with the highest humidity are June and July, with an average relative humidity of 81%.
With an average of 15h and 0min of daylight, June has the longest days of the year.
The months with the highest UV index are June through August, with an average maximum UV index of 6.
In Williamstown, the average temperatures in July are the highest, with a peak at 83.3°F (28.5°C) and a low of 66.6°F (19.2°C).
The month with the most sunshine in Williamstown is July, with an average of 10.4h of sunshine.
The least humid month is October, with an average relative humidity of 71%.
With an average of 9h and 24min of daylight, December has the shortest days of the year.
Average temperature
Williamstown, MO
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (31.6°F).
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure
Williamstown, MO
- Average pressure in January:
30.15"Hg - Average pressure in February:
30.13"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.94"Hg - Average pressure in June:
29.9"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.02"Hg - Average pressure in November:
30.1"Hg - Average pressure in December:
30.12"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed
Williamstown, MO
- Average wind speed in January:
10.5mph - Average wind speed in February:
10.4mph - Average wind speed in March:
10.4mph - Average wind speed in April:
10.3mph - Average wind speed in May:
8.6mph - Average wind speed in June:
7.7mph
- Average wind speed in July:
6.7mph - Average wind speed in August:
6.7mph - Average wind speed in September:
7.6mph - Average wind speed in October:
9.3mph - Average wind speed in November:
10.1mph - Average wind speed in December:
9.9mph
The windiest month (with the highest average wind speed) is January (10.5mph).
The calmest months (with the lowest average wind speed) are July and August (6.7mph).
Average humidity
Williamstown, MO
The months with the highest relative humidity are June and July (81%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Williamstown, MO
- Average rainfall in January:
1.22" - Average rainfall in February:
1.3" - Average rainfall in March:
2.17" - Average rainfall in April:
3.15" - Average rainfall in May:
3.7" - Average rainfall in June:
3.58"
The wettest month (with the highest rainfall) is May (3.7").
The driest month (with the least rainfall) is January (1.22").
Average rainfall days
Williamstown, MO
- Average rainfall days in January:
4.8 days - Average rainfall days in February:
4.7 days - Average rainfall days in March:
12.3 days - Average rainfall days in April:
14.8 days - Average rainfall days in May:
17.6 days - Average rainfall days in June:
17.2 days
- Average rainfall days in July:
14.6 days - Average rainfall days in August:
12.3 days - Average rainfall days in September:
10.9 days - Average rainfall days in October:
10.1 days - Average rainfall days in November:
9 days - Average rainfall days in December:
6.1 days
The month with the highest number of rainy days is May (17.6 days).
The month with the least rainy days is February (4.7 days).
Average snowfall
Williamstown, MO
The month with the highest snowfall is January (3.98").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Williamstown, MO
- Average snowfall days in January:
7.4 days - Average snowfall days in February:
6.5 days - Average snowfall days in March:
3.8 days - Average snowfall days in April:
0.5 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:
0.4 days - Average snowfall days in November:
1 days - Average snowfall days in December:
5.1 days
The month with the highest number of snowfall days is January (7.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Williamstown, MO
- Average daylight in January:
9h and 42min - Average daylight in February:
10h and 42min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 24min - Average daylight in June:
15h and 0min
- Average daylight in July:
14h and 42min - Average daylight in August:
13h and 42min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 6min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 24min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January:
4h and 18min - Average sunshine in February:
4h and 42min - Average sunshine in March:
6h and 30min - Average sunshine in April:
8h and 12min - Average sunshine in May:
8h and 54min - Average sunshine in June:
10h and 12min
- Average sunshine in July:
10h and 24min - Average sunshine in August:
10h and 0min - Average sunshine in September:
9h and 30min - Average sunshine in October:
5h and 42min - Average sunshine in November:
5h and 30min - Average sunshine in December:
4h and 48min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days
Williamstown, MO
- Average sunshine days in January:
19.3 days - Average sunshine days in February:
16.6 days - Average sunshine days in March:
14.9 days - Average sunshine days in April:
13.8 days - Average sunshine days in May:
11.5 days - Average sunshine days in June:
10.9 days
- Average sunshine days in July:
13.4 days - Average sunshine days in August:
16.4 days - Average sunshine days in September:
17 days - Average sunshine days in October:
19.1 days - Average sunshine days in November:
18.7 days - Average sunshine days in December:
19.5 days
The month with the most sunshine days is December (19.5 days).
The month with the least sunshine days is June (10.9 days).
Average UV index
Williamstown, MO
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Williamstown, MO
The month with the most cloud cover is January (Cloud cover 53).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility
Williamstown, 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).
