Climate and monthly weather forecastChesterfield, MO
Climate and monthly weather forecast
The climate of Chesterfield
Chesterfield, Missouri, United States, experiences a predominate Humid subtropical climate devoid of a dry season, evident by the Köppen climate classification "Cfa". The town is subject to a myriad of different weather conditions affected by geographical position and time of the year.Throughout the year, the weather parameters exhibit considerable variations. High temperatures range from as low as 37.8°F (3.2°C) in the winter months to a sweltering 87.4°F (30.8°C) in the summer. At the same time, lows vary from a chill 24.1°F (-4.4°C) to a mild 68.5°F (20.3°C). The region's relative humidity levels remain constant, staying within a narrow band, ranging from a low of 71% to a peak of 78%.
Chesterfield experiences rainfall throughout the year, with accumulations ranging from 0.04" (1mm) in the drier months of February to a high of 0.12" (3mm), usually in May. Interestingly, the number of rainy days per month increases from February's 6.9 days to reach a peak of 16.3 days in May and then drops consistently, reaching its lowest level of 7.2 days in December. Snowfall occurs mostly between the months of January and March, and again in December. However, the amount of snow is less than 1.69" (43mm) even during these months.
The best time to visit Chesterfield
June to August marks the best time to visit Chesterfield, Missouri. These months bring about the highest average temperatures, reaching up to 87.4°F (30.8°C), and relative humidity levels are at a comfortable range of 76% to 78%. Additionally, the sunshine hours are at their peak, averaging 10.5 hours per day. Consequently, these conditions provide the ideal weather for outdoor activities and sightseeing, ensuring visitors have the best experience.The worst time to visit Chesterfield
Winter months, notably January and February, are considered the least ideal time for a leisure trip to Chesterfield. During these months, temperatures fluctuate between a chilly 24.1°F (-4.4°C) and a high of 42.4°F (5.8°C). Additionally, these months witness the highest levels of snowfall of the year between 1.42" (36mm) to 1.69" (43mm). These weather conditions can pose challenges for outdoor activities and travel logistics, hence making these months unfavorable for a visit.Spring weather in Chesterfield
Spring in Chesterfield spans from March to May, featuring a gradual rise in temperature, which goes up from 54.7°F (12.6°C) to 75°F (23.9°C) by May. The period also sees consistent rainfall between 0.08" (2mm) to 0.12" (3mm) per month, and an increase in the number of rainy days from 13.1 in March to 16.3 in May. Even with the moisture, springtime brings more sunlight, escalating from twelve hours per day in March to an impressive fourteen hours in May.Summer weather in Chesterfield
The summer months from June through August provide Chesterfield with its warmest weather conditions, with average highs from 84.4°F (29.1°C) to 87.4°F (30.8°C). Alongside heat, these months also experience their share of rainfall, averaging slightly below 0.12" (3mm). Nevertheless, the region enjoys its longest daylight hours, exceeding fourteen hours per day, ensuring ample opportunity for outdoor activities.Autumn weather in Chesterfield
Autumn in Chesterfield, occurring between September and November, reveals a steady decline in temperature from 79.7°F (26.5°C) to a cool 53.6°F (12°C) in November. Rainfall is moderate, ranging from 0.08" (2mm) to 0.08" (2mm), as the number of rainy days gently declines from 12 to 8.4 days. With average daylight hours lasting between ten to twelve hours, Autumn provides a scenic view of falling leaves under relatively clear skies.Winter weather in Chesterfield
The winter months from December to February in Chesterfield are characterized by cold temperatures, with averages fluctuating between 24.1°F (-4.4°C) to 42.4°F (5.8°C). These months also witness sporadic snowfall, ranging from 0.28" (7mm) to 1.42" (36mm), creating a chilly atmosphere fit for winter lovers and skiing enthusiasts. However, daylight hours are at the shortest with 9.5 hours in December, indicating long, cold winter nights.Weather in January
Winter sets a chilly stage for the start of the year in Chesterfield, Missouri. The grey cloud cover is reluctant to fade, often blanketing the city with around 49% coverage, and bringing an average snowfall of 1.42" (36mm). This month is also notable for its limited amount of daylight, estimated at around 9.8 hours per day. Weather in January »Weather in February
Following January, February continues the winter narrative, although signs of change start to appear. The month experiences an increase in daylight to approximately 10.8 hours, and the average high temperature inches up a little. Weather in February »Weather in March
With the arrival of March, the icy grip of winter starts to loosen on Chesterfield. As the city bids farewell to snow, rainfall registers a remarkable increase from 1.3" (33mm) in February to 1.85" (47mm) in March. Longer hours of daylight and the mild temperature offer a pleasant welcome to spring. Weather in March »Weather in April
In April, Chesterfield fully leaps into spring. The warming trend accelerates with the average high temperature climbing from 54.7°F (12.6°C) in March to 65.8°F (18.8°C) in April. The city receives more plentiful sunshine, and the frequency and volume of rainfall increase, nurturing the growth of new vegetation. Weather in April »Weather in May
May is the gateway to the much-awaited arrival of summer in Chesterfield. The city looks more green and fecund with the increased humidity from 75% in April to 78% in May. The inhabitants readily exchange their spring clothing for lighter summer wear. Weather in May »Weather in June
June marks the full bloom of summer in Chesterfield and is characterized by longer days and a significant rise in temperature. The UV index hits the annual peak of 7, emphasizing the intensity of the June sun. The city gears up for sumptuous barbecues, delightful picnics, and enriching hikes. Weather in June »Weather in July
The height of summer hits its stride in July with Chesterfield experiencing the highest average temperature of 87.4°F (30.8°C). The weather compels locals and visitors alike to seek relief in the city's pools and nearby water bodies. Weather in July »Weather in August
After the peak of July, August continues to carry forward the chorus of summer, albeit with slightly less intensity. It remains primarily hot in the city with a temperature transition from the high of July to a slightly milder 86.2°F (30.1°C). Weather in August »Weather in September
As September rolls in, the weather in Chesterfield undergoes a considerable transformation. The city delegates itself to the arrival of autumn, with the temperature falling from a high of 86.2°F (30.1°C) in August to 79.7°F (26.5°C) in September. Weather in September »Weather in October
October brings a distinct feel of autumn to Chesterfield as the cooler weather gradually sets in. The city displays a dramatic drop in temperature, transitioning from a high of 79.7°F (26.5°C) in September to 66.4°F (19.1°C) in October. Weather in October »Weather in November
November steers Chesterfield towards the colder times as winter starts edging in. The onset of the holiday season combines with the dropping temperature which lowers to an average high of 53.6°F (12°C). The fall of red and yellow leaves paves the way for barren trees, indicating the nearing end of autumn. Weather in November »Weather in December
Winter returns to Chesterfield in December, transforming the cityscape into a colder, quieter place. Snowfall makes a comeback after months of absence, with an average of 1.06" (27mm) falling. The chill in the air, combined with the festive décor adorning houses and shops, adds to the holiday spirit. Weather in December »Updated: Aug 20, 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
The coldest time of the year is January, with temperatures averaging a high of 37.8°F (3.2°C) and a low of 24.1°F (-4.4°C).
In Chesterfield, during the entire year, the rain falls for 139.6 days and collects up to 26.1" (663mm) of precipitation.
January through March, November and December are months with snowfall.
Throughout the year, there are 18.9 snowfall days, and 4.92" (125mm) of snow is accumulated.
The month with the least sunshine is January, with an average of 4.7h of sunshine.
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
The month with the least rainfall is February, when the rain falls for 6.9 days and typically collects 1.3" (33mm) of precipitation.
February is the month with the most snowfall. Snow falls for 5.3 days and accumulates 1.69" (43mm) of snow.
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.
April through October are months without snowfall.
The most humid month is May, with an average relative humidity of 78%.
The month with the most rainfall is May, when the rain falls for 16.3 days and typically aggregates up to 3.19" (81mm) of precipitation.
June has the longest days of the year, with an average of 14h and 48min of daylight.
With an average maximum UV index of 7, June is the month with the highest UV index.
July tends to be the warmest month in Chesterfield, with temperatures averaging a daily high of 87.4°F (30.8°C) and a low of 68.5°F (20.3°C).
With an average of 10.6h of sunshine, July has the most sunshine of the year in Chesterfield.
The least humid month is October, with an average relative humidity of 71%.
With an average of 9h and 30min of daylight, December has the shortest days of the year.
Average temperature
Chesterfield, MO
The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (37.8°F).
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (24.1°F).
Average pressure
Chesterfield, 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:
29.95"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
Chesterfield, MO
- Average wind speed in January:
8.9mph - Average wind speed in February:
8.8mph - Average wind speed in March:
8.6mph - Average wind speed in April:
8.6mph - Average wind speed in May:
7mph - Average wind speed in June:
6.3mph
- Average wind speed in July:
5.4mph - Average wind speed in August:
5.5mph - Average wind speed in September:
5.8mph - Average wind speed in October:
7.3mph - Average wind speed in November:
8.1mph - Average wind speed in December:
8.3mph
The windiest month (with the highest average wind speed) is January (8.9mph).
The calmest month (with the lowest average wind speed) is July (5.4mph).
Average humidity
Chesterfield, MO
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Chesterfield, MO
- Average rainfall in January:
1.38" - Average rainfall in February:
1.3" - Average rainfall in March:
1.85" - Average rainfall in April:
2.83" - Average rainfall in May:
3.19" - Average rainfall in June:
2.76"
- Average rainfall in July:
2.64" - Average rainfall in August:
2.99" - Average rainfall in September:
1.89" - Average rainfall in October:
2.32" - Average rainfall in November:
1.46" - Average rainfall in December:
1.5"
The wettest month (with the highest rainfall) is May (3.19").
The driest month (with the least rainfall) is February (1.3").
Average rainfall days
Chesterfield, MO
- Average rainfall days in January:
6.8 days - Average rainfall days in February:
6.9 days - Average rainfall days in March:
13.1 days - Average rainfall days in April:
13.8 days - Average rainfall days in May:
16.3 days - Average rainfall days in June:
14.6 days
- Average rainfall days in July:
15.4 days - Average rainfall days in August:
14.5 days - Average rainfall days in September:
12 days - Average rainfall days in October:
10.6 days - Average rainfall days in November:
8.4 days - Average rainfall days in December:
7.2 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is January (6.8 days).
Average snowfall
Chesterfield, MO
The month with the highest snowfall is February (1.69").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Chesterfield, MO
- Average snowfall days in January:
6.7 days - Average snowfall days in February:
5.3 days - Average snowfall days in March:
1.9 days - Average snowfall days in April:
0.3 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:
1.1 days - Average snowfall days in December:
3.5 days
The month with the highest number of snowfall days is January (6.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Chesterfield, MO
- Average daylight in January:
9h and 48min - Average daylight in February:
10h and 48min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 12min - Average daylight in May:
14h and 18min - Average daylight in June:
14h and 48min
- Average daylight in July:
14h and 36min - Average daylight in August:
13h and 36min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 12min - Average daylight in November:
10h and 6min - Average daylight in December:
9h and 30min
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 42min - Average sunshine in February:
4h and 48min - Average sunshine in March:
6h and 36min - Average sunshine in April:
8h and 36min - Average sunshine in May:
9h and 30min - Average sunshine in June:
10h and 30min
- Average sunshine in July:
10h and 36min - Average sunshine in August:
10h and 18min - Average sunshine in September:
9h and 36min - Average sunshine in October:
6h and 6min - Average sunshine in November:
5h and 36min - Average sunshine in December:
4h and 54min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days
Chesterfield, MO
- Average sunshine days in January:
20.2 days - Average sunshine days in February:
16.3 days - Average sunshine days in March:
15.5 days - Average sunshine days in April:
15.3 days - Average sunshine days in May:
12.8 days - Average sunshine days in June:
12 days
- Average sunshine days in July:
13.4 days - Average sunshine days in August:
14.2 days - Average sunshine days in September:
16.5 days - Average sunshine days in October:
19.2 days - Average sunshine days in November:
19.4 days - Average sunshine days in December:
20.2 days
The months with the most sunshine days are January and December (20.2 days).
The month with the least sunshine days is June (12 days).
Average UV index
Chesterfield, MO
The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Chesterfield, MO
The month with the most cloud cover is January (Cloud cover 49).
The months with the least cloud cover are July and August (Cloud cover 27).
Average visibility
Chesterfield, 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).
