Climate and monthly weather forecastChester, PA
Climate and monthly weather forecast
The climate of Chester
Located in the state of Pennsylvania, USA, Chester features a unique blend of weather conditions throughout the year. The city has a Koppen climate classification of Cfa which indicates a humid subtropical climate with no dry season. This geographical placement assigns Chester with distinct weather changes across four notable seasons.From the periodic data, interesting trends become evident. Clear climate parameters shape Chester's weather, with temperature fluctuations, distinctive humidity levels, and rainfall serving as key indicators. Among them, alterations in temperature stand out. Low averages from 25.7°F (-3.5°C) to 68.7°F (20.4°C) and high averages between 37.4°F (3°C) and 85.6°F (29.8°C) show a prominent range. These fluctuations manifest distinctly across different months, making each season unique.
Relative humidity remains fairly steady, with values ranging between 71% and 77%. Rainfall indicates variability, with monthly averages of 1.61" (41mm) to 3.11" (79mm) and number of days with rain fluctuating from 7.1 to 17.
A singular feature of Chester's climate is its periodical mix of rain and snow, noticeable from the recorded data. The presence of snow is particularly interesting with monthly averages showing values from 0.16" (4mm) to 2.32" (59mm), translated into the number of days with snow varying from a blip of 0.1 to a significant 3.8 days.
The best time to visit Chester
One might consider the warm period from May to September as an ideal time to visit Chester. During this period, high averages of 72°F (22.2°C) to 85.6°F (29.8°C) and comfortable humidity levels around 73% to 76% create a pleasant climate. Daylight hours peak up to around 15 hours as the longest period of the year. Yet, visitors should prepare for some rainfall with the highest amount of 3.11" (79mm) in August and a maximum of 17 rainy days in July.The worst time to visit Chester
The colder months of Chester, specifically January and February, can be challenging for visitors. With low averages dropping to 25.7°F (-3.5°C) and 27.9°F (-2.3°C) respectively, these months bring a significant chill. Additionally, these months present the least daylight hours, bottoming at around 9.7 hours.Spring weather in Chester
Spring in Chester unfolds from March to May with temperatures climbing from an average low of 34.9°F (1.6°C) to a comfortable high of 72°F (22.2°C). A gradual increase in daylight hours from 12 to 14.4 hours might entice outdoor explorations. Nonetheless, the spring months experience a considerable increase in rainfall, with averages rising from 2.28" (58mm) in March to 2.32" (59mm) in May.Summer weather in Chester
Starting in June and concluding in August, summer in Chester stands out as the warmest season. With temperatures averaging a high of 85.6°F (29.8°C) in July, coupled with the most substantial brightness, approximately 15 hours of daylight, summer indeed shines bright. The occasional rainfall does cool off the region, with rainfall peaking at 3.11" (79mm) in August.Autumn weather in Chester
Seasonal transitions mark autumn months in Chester, from September to November. Temperatures start to drop slowly from a high of 76.6°F (24.8°C) in September to a modest 52.7°F (11.5°C) in November. Rainfall sees a noticeable decline, with November inviting fewer rainy days, around 8.7 days. Daylight hours also begin to retract, dipping from 12.4 hours in September to 10 hours in November.Winter weather in Chester
Winter engulfs Chester from December to February, presenting markedly colder temperatures. A high of 44.1°F (6.7°C) in December gradually slips to a low of 25.7°F (-3.5°C) in January. The days grow shorter with the least daylight hours around 9.4 in December. The presence of snow during winter adds a frosty touch, reaching a peak of 2.32 in March. Despite its cold embrace, the winter season holds its unique charm and tranquillity.Weather in January
Chester, Pennsylvania welcomes the new year with the brisk chill of winter. This month is colder than December, but slightly higher in temperature relation to February. The city experiences snowfall, witnessing an average of 1.73" (44mm). Weather in January »Weather in February
February is the coldest month in Chester, Pennsylvania, but there is a slight increase in daily sunshine hours when compared with January. The city receives a lesser amount of snowfall, 1.61" (41mm), compared to the previous month. Weather in February »Weather in March
The month of March signals the transition from winter to spring in Chester. The climate begins to warm up with an uptick in the average temperatures. However, the city does experience the highest snowfall of the year at 2.32" (59mm), the start of the month still clings to winter's edge. Weather in March »Weather in April
April is characterized by a significant leap in temperatures, helping to shake off the lingering chill of winter. Chester experiences rainfall around 2.01" (51mm), with the recurrence of rain affecting the relative humidity. Despite the showers, the amount of sunshine per day increases, indicating the progression towards the brighter, warmer months. Weather in April »Weather in May
May is the start of the warmer period in Chester, with temperatures climbing steadily. A small increase in rainfall to 2.32" (59mm) marks the late arrival of spring showers. Despite the increased precipitation, this month is generally pleasant with the increase in daylight hours and temperatures paving the way for outdoor activities. Weather in May »Weather in June
The arrival of June marks the beginning of summer in Chester, Pennsylvania. The weather is reliably warm, with the longest daylight hours throughout the year. However, this month sees the most amounts of rainfall at 2.28" (58mm), but it comes with an increased amount of sunshine per day. Weather in June »Weather in July
In Chester, July is the warmest month of the year, characterized by its high temperatures and extended daylight hours. This month sees the highest average humidity relative to the rest of the year, making the heat ambience prominent. Weather in July »Weather in August
August in Chester brings together high temperatures and increased rainfall, which peaks at 3.11" (79mm). While the temperatures just slightly dip from July, the diminished daylight hours hint towards the approaching end of summer. Weather in August »Weather in September
September marks a significant change in Chester's climate as temperatures begin to cool. A drop in rainfall to 1.73" (44mm) signifies the arrival of early autumn. The city eagerly welcomes autumn as the leaves begin to change color, offering a spectacular canvas of hues. Weather in September »Weather in October
October brings a crisp chill to Chester as autumn sets in firmly. The trees are in their full fall glory, offering an exquisite view of the colorful canopy. Rainfall and temperatures continue to drop from September, but even with the cooler conditions, the city remains visually stunning. Weather in October »Weather in November
In November, Chester moves deeper into the fall season with a further drop in temperatures. The onset of the winter chill is evident with the return of snowfall at approximately 0.35" (9mm). The fallen leaves transform the landscape, wrapping the city in a cascade of vibrant hues. Weather in November »Weather in December
Chester, Pennsylvania welcomes December with winter's cool embrace. This month receives the most snowfall at about 0.91" (23mm). Despite the dark, cold days, the city is lit up by holiday lights, creating a festive atmosphere. It is a time of quietness and calm, as Chester wraps up the year awaiting another round of changing seasons. In Chester, entering December brings a subtle temperature decrement, reducing from November's fresh 52.7°F (11.5°C) to a frosty 44.1°F (6.7°C). Weather in December »Updated: Aug 25, 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
In Chester, January is the month with the lowest recorded average temperatures, measuring a high of 37.4°F (3°C) and a low of 25.7°F (-3.5°C).
January is the month with the least rainfall. Rain falls for 7.1 days and accumulates 1.61" (41mm) of precipitation.
In Chester, during the entire year, the rain falls for 148.4 days and collects up to 25.94" (659mm) of precipitation.
January through May, November and December are months with snowfall.
In Chester, during the entire year, snow falls for 12.6 days and aggregates up to 7.28" (185mm) of snow.
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
The months with the highest humidity are February, October and December, with an average relative humidity of 77%.
The month with the least sunshine is February, with an average of 4.9h of sunshine.
The month with the most snowfall is March, when snow falls for 3 days and typically aggregates up to 2.32" (59mm) of snow.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
April is the least humid month, with an average relative humidity of 71%.
The months with the highest UV index are May through August, with an average maximum UV index of 6.
June through October are months without snowfall.
The month with the longest days in Chester is June, with an average of 15h and 0min of daylight.
In Chester, the peak average temperatures are observed in July, with a high of 85.6°F (29.8°C) and a low of 68.7°F (20.4°C).
The month with the most sunshine is July, with an average of 10.7h of sunshine.
The month with the most rainfall is August, when the rain falls for 16.1 days and typically aggregates up to 3.11" (79mm) of precipitation.
The month with the shortest days is December, with an average of 9h and 24min of daylight.
Average temperature
Chester, PA
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (37.4°F).
The month with the highest average low temperature is July (68.7°F).
The coldest month (with the lowest average low temperature) is January (25.7°F).
Average pressure
Chester, PA
- Average pressure in January:
30.09"Hg - Average pressure in February:
30.06"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.99"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
29.94"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.99"Hg - Average pressure in September:
30.05"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.09"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed
Chester, PA
- Average wind speed in January:
8.4mph - Average wind speed in February:
8.5mph - Average wind speed in March:
8.6mph - Average wind speed in April:
8.5mph - Average wind speed in May:
6.8mph - Average wind speed in June:
6.3mph
- 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:
7.2mph - Average wind speed in November:
7.6mph - Average wind speed in December:
7.9mph
The windiest month (with the highest average wind speed) is March (8.6mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).
Average humidity
Chester, PA
The months with the highest relative humidity are February, October and December (77%).
The month with the lowest relative humidity is April (71%).
Average rainfall
Chester, PA
- Average rainfall in January:
1.61" - Average rainfall in February:
1.73" - Average rainfall in March:
2.28" - Average rainfall in April:
2.01" - Average rainfall in May:
2.32" - Average rainfall in June:
2.28"
- Average rainfall in July:
2.68" - Average rainfall in August:
3.11" - Average rainfall in September:
1.73" - Average rainfall in October:
1.97" - Average rainfall in November:
1.89" - Average rainfall in December:
2.32"
The wettest month (with the highest rainfall) is August (3.11").
The driest month (with the least rainfall) is January (1.61").
Average rainfall days
Chester, PA
- Average rainfall days in January:
7.1 days - Average rainfall days in February:
8.2 days - Average rainfall days in March:
13.2 days - Average rainfall days in April:
13.4 days - Average rainfall days in May:
16.3 days - Average rainfall days in June:
15.4 days
- Average rainfall days in July:
17 days - Average rainfall days in August:
16.1 days - Average rainfall days in September:
12.6 days - Average rainfall days in October:
11.7 days - Average rainfall days in November:
8.7 days - Average rainfall days in December:
8.7 days
The month with the highest number of rainy days is July (17 days).
The month with the least rainy days is January (7.1 days).
Average snowfall
Chester, PA
- Average snowfall in January:
1.73" - Average snowfall in February:
1.61" - Average snowfall in March:
2.32" - Average snowfall in April:
0.2" - Average snowfall in May:
0.16" - Average snowfall in June:
0"
The month with the highest snowfall is March (2.32").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days
Chester, PA
- Average snowfall days in January:
3.5 days - Average snowfall days in February:
3.8 days - Average snowfall days in March:
3 days - Average snowfall days in April:
0.3 days - Average snowfall days in May:
0.1 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 days - Average snowfall days in November:
0.4 days - Average snowfall days in December:
1.5 days
The month with the highest number of snowfall days is February (3.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight / Average sunshine
Chester, PA
- 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:
5h and 0min - Average sunshine in February:
4h and 54min - Average sunshine in March:
6h and 30min - Average sunshine in April:
8h and 30min - Average sunshine in May:
8h and 42min - Average sunshine in June:
10h and 6min
- Average sunshine in July:
10h and 42min - Average sunshine in August:
10h and 18min - Average sunshine in September:
8h and 54min - Average sunshine in October:
5h and 42min - Average sunshine in November:
5h and 42min - Average sunshine in December:
5h and 6min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).
Average sunshine days
Chester, PA
- Average sunshine days in January:
20.8 days - Average sunshine days in February:
16.3 days - Average sunshine days in March:
15.3 days - Average sunshine days in April:
15.3 days - Average sunshine days in May:
12.7 days - Average sunshine days in June:
12.5 days
- Average sunshine days in July:
11.3 days - Average sunshine days in August:
12.5 days - Average sunshine days in September:
15.5 days - Average sunshine days in October:
17.5 days - Average sunshine days in November:
20.3 days - Average sunshine days in December:
20.5 days
The month with the most sunshine days is January (20.8 days).
The month with the least sunshine days is July (11.3 days).
Average UV index
Chester, PA
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, November and December (UV index 2).
Average cloud cover
Chester, PA
The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility
Chester, PA
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).
