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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, like December, in Washington, Missouri, is another cold winter month, with an average temperature fluctuating between 24.1°F (-4.4°C) and 38.1°F (3.4°C). Washington's temperature records reveal January as the coldest month, marked by average highs of 38.1°F (3.4°C) and lows of 24.1°F (-4.4°C). Weather in January »
Weather in February
The last month of the winter, February, is a frosty month in Washington, Missouri, with an average temperature ranging between max 42.8°F (6°C) and min 27.9°F (-2.3°C). With the advent of February, Washington's high-temperatures adjust to a chilly 42.8°F (6°C), closely aligning with the preceding month. Weather in February »
Weather in March
March, the first month of the spring in Washington, is a fresh month, with an average temperature ranging between min 37.6°F (3.1°C) and max 54.9°F (12.7°C). March brings a temperature change, with average high-temperatures moving from February's chilly 42.8°F (6°C) to a cool 54.9°F (12.7°C). Weather in March »
Weather in April
April in Washington, Missouri, is an enjoyable spring month, with an average temperature varying between 66.2°F (19°C) and 46.9°F (8.3°C). Washington in April sees a temperature change, with average high-temperatures moving from a fresh 54.9°F (12.7°C) in March to a comfortable 66.2°F (19°C). Weather in April »
Weather in May
The last month of the spring, May, is a warm month in Washington, Missouri, with an average temperature ranging between max 75.7°F (24.3°C) and min 56.3°F (13.5°C). As May sets, the average high-temperature shows an increase, moving up from an enjoyable 66.2°F (19°C) in April to a warm 75.7°F (24.3°C). Weather in May »
Weather in June
The first month of the summer, June, is still a warm month in Washington, Missouri, with an average temperature fluctuating between 64.9°F (18.3°C) and 85.6°F (29.8°C). A shift in the average high-temperature is noticeable in June, changing from a moderately hot 75.7°F (24.3°C) in May to a still warm 85.6°F (29.8°C). Weather in June »
Weather in July
July in Washington, Missouri, is a tropical summer month, with an average temperature ranging between max 88.3°F (31.3°C) and min 68.2°F (20.1°C). July, recording an average high temperature of 88.3°F (31.3°C) and a low temperature of 68.2°F (20.1°C), is Washington's warmest month. The heat index value during July is appraised at a scorching 104°F (40°C). Weather in July »
Weather in August
The last month of the summer, August, is another tropical month in Washington, Missouri, with an average temperature ranging between min 65.8°F (18.8°C) and max 87.1°F (30.6°C). August reports an average high-temperature of a still tropical 87.1°F (30.6°C), slightly varied from July's 88.3°F (31.3°C). Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Washington, Missouri, with an average temperature fluctuating between 80.1°F (26.7°C) and 59.2°F (15.1°C). With September's onset, the weather reveals a slight temperature decrease, transitioning from a hot 87.1°F (30.6°C) in August to a warm 80.1°F (26.7°C). Weather in September »
Weather in October
October, like September, in Washington, Missouri, is another comfortable autumn month, with an average temperature ranging between min 48.2°F (9°C) and max 66.2°F (19°C). The shift from September to October corresponds with a decrease in the average high-temperature, down to an enjoyable 66.2°F (19°C) from a warm 80.1°F (26.7°C). Weather in October »
Weather in November
November, the last month of the autumn in Washington, is another cool month, with an average temperature ranging between max 53.8°F (12.1°C) and min 37.2°F (2.9°C). In November, the average high-temperature goes from a refreshing 66.2°F (19°C) in October to a fresh 53.8°F (12.1°C). Weather in November »
Weather in December
The first month of the winter, December, is still a chilly month in Washington, Missouri, with an average temperature ranging between max 43.2°F (6.2°C) and min 29.7°F (-1.3°C). The commencement of December involves a temperature shift, with the average high-temperature dropping from a fresh 53.8°F (12.1°C) in November to a frosty 43.2°F (6.2°C). Weather in December »
Updated: Jul 19, 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
What are the coldest months?
January, characterized by an average high temperature of 38.1°F (3.4°C) and a low temperature of 24.1°F (-4.4°C), is generally the coldest month.
How much does it rain?
Throughout the year, there are 133.1 rainfall days, and 27.24" (692mm) of precipitation is accumulated.
When does it snow in Washington?
January through March, September, November and December are months with snowfall.
How much does it snow?
In Washington, during the entire year, snow falls for 16.6 days and aggregates up to 5.87" (149mm) of snow.
What is the month with the least sunshine?
January has the least sunshine of the year, with an average of 4.6h of sunshine.
When is the lowest UV index?
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
What is the driest month?
February is the month with the least rainfall. Rain falls for 7.1 days and accumulates 1.42" (36mm) of precipitation.
What is the snowiest month?
The month with the most snowfall is February, when snow falls for 4.9 days and typically aggregates up to 2.09" (53mm) of snow.
When is Daylight Saving Time (DST)?
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.
What is the wettest month?
The wettest months are April and May, with an average 3.23" (82mm) of rainfall.
When it does not snow?
In Washington, snow does not fall in April through August and October.
What is the most humid month?
The most humid month in Washington is May, with an average relative humidity of 78%.
When are the longest days?
With an average of 14h and 48min of daylight, June has the longest days of the year in Washington.
What are the months with the most sunshine?
The months with the most sunshine are June and July, with an average of 10.3h of sunshine.
What are the months with the highest UV index?
June through August, with an average maximum UV index of 6, are months with the highest UV index.
What part of the year is the hottest?
Temperature records mark July as the warmest month, with highs averaging 88.3°F (31.3°C) and lows at 68.2°F (20.1°C).
What is the least humid month?
With an average relative humidity of 72%, October is the least humid month.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 30min of daylight.
Average temperature
Washington, MO
The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is January (38.1°F).
The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (24.1°F).
Average pressure
Washington, 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:
29.93"Hg - Average pressure in May:
29.95"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.97"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
Washington, MO
- Average wind speed in January:
8.5mph - Average wind speed in February:
8.4mph - Average wind speed in March:
8.3mph - Average wind speed in April:
8.3mph - Average wind speed in May:
6.7mph - Average wind speed in June:
6.2mph
- Average wind speed in July:
5.4mph - Average wind speed in August:
5.3mph - Average wind speed in September:
5.7mph - Average wind speed in October:
7mph - Average wind speed in November:
7.8mph - Average wind speed in December:
8mph
The windiest month (with the highest average wind speed) is January (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity
Washington, MO
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Washington, MO
- Average rainfall in January:
1.46" - Average rainfall in February:
1.42" - Average rainfall in March:
2.24" - Average rainfall in April:
3.23" - Average rainfall in May:
3.23" - Average rainfall in June:
2.64"
- Average rainfall in July:
2.48" - Average rainfall in August:
3.03" - Average rainfall in September:
1.89" - Average rainfall in October:
2.36" - Average rainfall in November:
1.69" - Average rainfall in December:
1.57"
The wettest months (with the highest rainfall) are April and May (3.23").
The driest month (with the least rainfall) is February (1.42").
Average rainfall days
Washington, MO
- Average rainfall days in January:
6.2 days - Average rainfall days in February:
7.1 days - Average rainfall days in March:
12.3 days - Average rainfall days in April:
13.3 days - Average rainfall days in May:
16.3 days - Average rainfall days in June:
13.1 days
- Average rainfall days in July:
14.5 days - Average rainfall days in August:
13.8 days - Average rainfall days in September:
11 days - Average rainfall days in October:
10.1 days - Average rainfall days in November:
8.9 days - Average rainfall days in December:
6.5 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is January (6.2 days).
Average snowfall
Washington, MO
The month with the highest snowfall is February (2.09").
The months with the least snowfall are April, May, June, July, August and October (0").
Average snowfall days
Washington, MO
- Average snowfall days in January:
5.1 days - Average snowfall days in February:
4.9 days - Average snowfall days in March:
1.8 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:
0.1 days - Average snowfall days in October:
0.1 days - Average snowfall days in November:
1 days - Average snowfall days in December:
3.5 days
The month with the highest number of snowfall days is January (5.1 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight / Average sunshine
Washington, MO
- Average daylight in January:
9h and 5min - Average daylight in February:
10h and 5min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 1min - Average daylight in May:
14h and 2min - Average daylight in June:
14h and 5min
- Average daylight in July:
14h and 3min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 1min - Average daylight in December:
9h and 3min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January:
4h and 4min - Average sunshine in February:
4h and 4min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 2min - Average sunshine in May:
9h and 1min - Average sunshine in June:
10h and 2min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
10h and 0min - Average sunshine in September:
9h and 2min - Average sunshine in October:
5h and 5min - Average sunshine in November:
5h and 3min - Average sunshine in December:
4h and 5min
The months with the most sunshine are June and July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days
Washington, MO
- Average sunshine days in January:
20.3 days - Average sunshine days in February:
16.6 days - Average sunshine days in March:
15.6 days - Average sunshine days in April:
15.5 days - Average sunshine days in May:
12.8 days - Average sunshine days in June:
14.1 days
- Average sunshine days in July:
14.3 days - Average sunshine days in August:
15.6 days - Average sunshine days in September:
17 days - Average sunshine days in October:
19.6 days - Average sunshine days in November:
19.3 days - Average sunshine days in December:
20.6 days
The month with the most sunshine days is December (20.6 days).
The month with the least sunshine days is May (12.8 days).
Average UV index
Washington, 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
Washington, MO
The months with the most cloud cover are January and February (Cloud cover 50).
The months with the least cloud cover are June, July and August (Cloud cover 30).
Average visibility
Washington, MO
The months with the highest visibility are January, February, March, April, June, July, September, October, November and December (6mi).
The months with the lowest visibility are May and August (5mi).
Washington, Missouri, USA
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