Climate and monthly weather forecast
Coatesville, PA


The climate of Coatesville

Nestled in the state of Pennsylvania, Coatesville identifies with the Köppen climate classification of Cfa, which narrates a Humid subtropical climate without a dry season. This description of climate ensnares a rich mix of weather fluctuations, certain of which are noteworthy. For instance, throughout the year, the temperature ranges from a low of 23.4°F (-4.8°C) in January to a high of 83.5°F (28.6°C) in July, delivering a tangible sense of the area's diverse weather patterns.

An inspection of the provided meteorological data underlines a narrative of weather conditions that swings from one extreme to another. Manifested in the movement of mercury, winters in Coatesville are prominently colder with the lowest temperature dipping to 23.4°F (-4.8°C), while summers see the thermometer rising to a good 83.5°F (28.6°C) in July. Rainfall varies across the year, from a low of 1.14" (29mm) in February to a high of 2.72" (69mm) in August. The frequency of rainfall days is in double digits from March to August, with a maximum of 16.8 days in July. Snowfall is confined to the colder months between November and March, hitting a maximum of 2.32" (59mm) in March.

Wind speeds climb to 8.8mph (14.2km/h) in January and again in February and March, tapering off to a calm 5.3mph (8.5km/h) in July. This paints a portrait of Coatesville as a place with varied wind conditions. Visibility remains consistent at 6 miles throughout the year, seemingly unaffected by the divergent weather conditions.

With daylight hours expanding from 9.7 hours in January to 15 hours in June, and sunshine hours ramping up from 4.6 hours in January to 10.4 hours in July, seasonal shifts are evident. The UV index also attests to such changes, surging from 2 in the cooler months to a high of 6 during the warmer months, from May to August.

The best time to visit Coatesville

The weather in Coatesville leans toward the more favorable side for an enjoyable visit between May to September. During this period, temperatures hang around a warm 70.3°F (21.3°C) to 83.5°F (28.6°C), providing an agreeable climate for outdoor excursions. Additionally, these months also boast daylight hours above 14, with June offering a generous 15 hours, thereby lending extra time to revel in the experiences the city offers. UV indices rise during these months, hence taking necessary precautions against sunburns remains essential.

The worst time to visit Coatesville

January and February are arguably less favorable for a visit to Coatesville, owing to the lower temperatures hovering around 23.4°F (-4.8°C) to 25.9°F (-3.4°C). Coupled with lesser daylight hours with a minimum of 9.7 hours in January, outdoor activities and sightseeing become rather limited during these months.

Spring weather in Coatesville

Spring in Coatesville, occurring from March to May, showcases a gentle climb in temperatures from 48°F (8.9°C) to 70.3°F (21.3°C). Daylight hours also stretch from 12 hours in March to 14.4 hours in May. However, these months see a heightened frequency of rainfall days, from 11.1 to 15.9.

Summer weather in Coatesville

Summer descends upon Coatesville between June to August, revealing temperatures from 78.1°F (25.6°C) to 83.5°F (28.6°C). Accompanied by extended daylight hours from 15 to 14.7, summer demonstrates the peak of enjoyable weather in Coatesville. Rainfall persists but the frequency lessens marginally from 14.9 days in June to 14.8 days in August.

Autumn weather in Coatesville

Autumn in Coatesville sets in from September to November, bringing with it a downward spiral of temperatures from 74.8°F (23.8°C) to 50.9°F (10.5°C). Daylight shrinks commensurately from 12.4 hours to 10, and sunshine hours drop as well.

Winter weather in Coatesville

The onset of winter in Coatesville, from December to February, ushers in temperatures that can plummet to as low as 23.4°F (-4.8°C). Daylight hours stay below 10.7, and sunshine hours become slightly sparse, indicating that winter bears the harshest weather the city experiences.

Weather in January

Facing the typical harshness of winter, Coatesville, Pennsylvania observes a cooler climate in January. A blanket of white is common, with 1.65" (42mm) of snowfall recorded. Compared to February, the weather conditions are slightly colder due to lower temperature ranges. Weather in January »

Weather in February

In February, Coatesville transitions into milder weather conditions. An increase in temperature and sunlight hours is discernible, but winter continues to prevail. The city sees a decrease in snowfall from 1.65" (42mm) to 1.5" (38mm) relative to January, which may not be a significant reduction but it is a signal of changing weather conditions. Weather in February »

Weather in March

March is widely recognized as the gateway to spring in Coatesville. It brings along a gradual rise in temperature with mild precipitation and a reduction in snowfall to 2.32" (59mm). As March progresses, residents prepare for transitional weather, as April will soon bring a relatively warmer temperature and increased daylight exposure. Weather in March »

Weather in April

April is a spring-tethered month in Coatesville, Pennsylvania, with warmer temperatures and longer daylight hours. There is a marked decrease in snowfall from 2.32" (59mm) in March to 0.28" (7mm) in this month. This does not only signify the dawn of spring, but it also carries with it the promise of blooming flora and new life. Weather in April »

Weather in May

May marks the graceful transition between spring and summer in Coatesville. Hotter temperatures and longer sunlight exposure contribute to creating an amicable environment. A transition from the snowfall of 0.28" (7mm) in April to 0.12" (3mm) in May, signals the termination of winter's remnants. Weather in May »

Weather in June

June introduces summer to Coatesville, promising hotter climate conditions and extended daylight. Residents can expect the disappearance of snow, marking a refreshing shift from the cooler months. Preparing for July, temperatures will see an escalation and the precipitation level will increase per the summer season. Weather in June »

Weather in July

Peaking summer temperatures render July the warmest month in Coatesville, Pennsylvania. The environment is saturated by consistent heat and 6 index UV radiation. On the road to August, the summer thrives with persistent sunlight and substantial heat contributing to the aridity. Weather in July »

Weather in August

August graces Coatesville with a hot summer, experiencing a decrease in temperature from a peak of 83.5°F (28.6°C) in July to 81.1°F (27.3°C). The warmth of this month actively contributes to the nourishment of the city's flora. Weather in August »

Weather in September

September in Coatesville signifies an initiation of cooler climate, transitioning from the warmth of summer to the early chills of fall. A considerable drop in temperature from 81.1°F (27.3°C) in August reflects the advent of autumn. Weather in September »

Weather in October

October encapsulates the essence of the fall season in Coatesville, with progressively cooler temperatures and shortening daylight hours. Coatesville resident can observe the intriguing interplay of the bleak chills of winter with mild warmth. Weather in October »

Weather in November

November ushers in a cold season in Coatesville, Pennsylvania with bracing climate conditions and reduced daylight hours. As it progresses, residents can notice the shift from scant during October to 0.47" (12mm) of snowfall. With December on the horizon, the weather will evolve to be colder, and snowfall will gradually increase, dragging the city deeper into winter. Weather in November »

Weather in December

December carries with it the distinctive chill of winter in Coatesville, the temperature dips and daylight diminishes further. From November's 0.47" (12mm) to 1.14" (29mm), the increase in snowfall records the approach of peak winter. Weather in December »

Frequently asked questions

What is the coldest time of year?

January, on average, is the coldest month, registering a high temperature of 35.6°F (2°C) and a low of 23.4°F (-4.8°C).

How many days does it rain?

In Coatesville, during the entire year, the rain falls for 138.3 days and collects up to 19.76" (502mm) of precipitation.

When does it snow?

January through May, October through December are months with snowfall.

How much does it snow?

In Coatesville, during the entire year, snow falls for 19.6 days and aggregates up to 7.64" (194mm) of snow.

What is the month with the lowest UV index?

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2.

What is the driest month?

The month with the least rainfall in Coatesville is February, when the rain falls for 6.9 days and typically collects 1.14" (29mm) of precipitation.

What is the month with the least sunshine?

With an average of 4.5h of sunshine, February has the least sunshine of the year.

What is the snowiest month?

March is the month with the most snowfall. Snow falls for 4.3 days and accumulates 2.32" (59mm) 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 EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.

What is the least humid month?

April is the least humid month, with an average relative humidity of 76%.

What is the most humid month in Coatesville?

May and October, with an average relative humidity of 81%, are most humid months.

What is the month with the highest UV index?

May through August, with an average maximum UV index of 6, are months with the highest UV index.

When it does not snow?

June through September are months without snowfall.

When are the longest days?

June has the longest days of the year in Coatesville, with an average of 15h and 0min of daylight.

What part of the year is the hottest?

In Coatesville, the average temperatures in July are the highest, with a peak at 83.5°F (28.6°C) and a low of 65.8°F (18.8°C).

What month has the most sunshine?

With an average of 10.4h of sunshine, July has the most sunshine of the year.

What is the rainiest month?

The month with the most rainfall is August, when the rain falls for 14.8 days and typically aggregates up to 2.72" (69mm) of precipitation.

What is the month with the shortest days?

With an average of 9h and 24min of daylight, December has the shortest days of the year.

Average temperature
Coatesville, PA

Average temperature - Coatesville, PA

The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is January (35.6°F).

The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).

Average pressure
Coatesville, PA

Average pressure - Coatesville, PA

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed
Coatesville, PA

Average wind speed - Coatesville, PA

The windiest months (with the highest average wind speed) are January, February and March (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

Average humidity
Coatesville, PA

Average humidity - Coatesville, PA

The months with the highest relative humidity are May and October (81%).
The month with the lowest relative humidity is April (76%).

Average rainfall
Coatesville, PA

Average rainfall - Coatesville, PA

The wettest month (with the highest rainfall) is August (2.72").
The driest month (with the least rainfall) is February (1.14").

Average rainfall days
Coatesville, PA

Average rainfall days - Coatesville, PA

The month with the highest number of rainy days is July (16.8 days).
The month with the least rainy days is January (6.4 days).

Average snowfall
Coatesville, PA

Average snowfall - Coatesville, PA

The month with the highest snowfall is March (2.32").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days
Coatesville, PA

Average snowfall days - Coatesville, PA

The month with the highest number of snowfall days is January (5.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight / Average sunshine
Coatesville, PA

Average daylight / Average sunshine - Coatesville, PA

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).

The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).

Average sunshine days
Coatesville, PA

Average sunshine days - Coatesville, PA

The month with the most sunshine days is November (20 days).
The month with the least sunshine days is July (12.4 days).

Average UV index
Coatesville, PA

Average UV index - Coatesville, 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, March, November and December (UV index 2).

Average visibility
Coatesville, PA

Average visibility - Coatesville, PA

The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).

Coatesville, Pennsylvania, USA

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