Climate and monthly weather forecastWesterville, OH
Climate and monthly weather forecast
The climate of Westerville
According to the Köppen climate classification, Westerville, Ohio is characterized by a humid continental climate with no dry season and hot summers (Dfa). This environment is typical of locations situated in the central and northeastern parts of the United States.Annual temperatures in Westerville present a noticeable fluctuation. The highest recorded temperatures range from 32.5°F (0.3°C) in January to the peak of 82°F (27.8°C) in July. Correspondingly, the nighttime can get quite chilly, ranging from 20.7°F (-6.3°C) in January, gradually increasing to a balmy 64.4°F (18°C) during July nights.
Rainfall is a consistent facet of Westerville climate, with precipitation observed every month. The rainfall amounts to a yearly total of 18.8" (478mm). May records the highest precipitation at 2.36" (60mm), whereas the lowest level of rainfall, 0.98" (25mm), occurs in February. The town experiences an average of 8.4 days of rain in January escalating to a high of 17.1 days in May.
Westerville, though known for its mild climate, does experience snowfall during the winter months. Snowfall occurs typically from November to March, with January and February experiencing higher snowfall of 1.65" (42mm) and 1.54" (39mm) respectively.
The best time to visit Westerville
Visitors planning to come to Westerville may find the summer months - from June to August - appealing. The regional climate experiences the highest temperatures, which range from 78.4°F (25.8°C) to 82°F (27.8°C). The daylight hours are generous during the summertime, averaging 15 hours per day, allowing ample exploration time. Similarly, the nights remain fairly warm, ranging from 61.2°F (16.2°C) to 64.4°F (18°C).The worst time to visit Westerville
Those considering travel to Westerville may want to avoid the colder winter months, specifically January and February. These months are marked by lower temperatures, with average highs of 32.5°F (0.3°C) and 37.4°F (3°C) respectively. The nights can be quite cold, with low temperatures averaging 20.7°F (-6.3°C) in January and 23.9°F (-4.5°C) in February.Spring weather in Westerville
Spring in Westerville is marked by gradually elevating temperatures and considerable rainfall. March sees temperatures ranging from 33.1°F (0.6°C) at night to 48.6°F (9.2°C) during the day. By the time May rolls around, these temperatures have climbed to a comfortable 71.4°F (21.9°C) during the day and 54°F (12.2°C) at night. Rainfall is noteworthy, peaking at 2.32" (59mm) in May.Summer weather in Westerville
Westerville experiences warm and humid summer months. June ushers in the summer warmth with daytime temperatures averaging 78.4°F (25.8°C) and dropping to around 61.2°F (16.2°C) at night. The warmest month of the year, July, has temperatures soaring to an average high of 82°F (27.8°C) and a comfortable 64.4°F (18°C) at night.Autumn weather in Westerville
Autumn in Westerville offers mild and enjoyable weather. This season sees daytime temperatures gradually decrease from a warm 75°F (23.9°C) in September to a cooler 49.1°F (9.5°C) by November. Nighttime temperatures similarly dwindle from 56.8°F (13.8°C) in September to 35.4°F (1.9°C) in November.Winter weather in Westerville
Winter in Westerville is marked by lower temperatures and occasional snowfall. During the coldest month, January, daytime temperatures hover around 32.5°F (0.3°C) on average, dropping further to an average low of 20.7°F (-6.3°C) at night. Snowfall is most significant in January and February, totaling 1.65" (42mm) and 1.54" (39mm) respectively.Weather in January
In Westerville, Ohio, the beginning of the year brings winter weather conditions. January features higher humidity rates compared to the national average with an uptick in pressure levels. Snow is commonplace this time of year, signalling the height of winter, with a cumulative snowfall of 1.65" (42mm) throughout the month. Weather in January »Weather in February
As Westerville transitions from January to February, slightly milder weather can be observed. Cold temperatures persist but sit somewhat warmer than the previous month, in conjunction with a small increase in daylight hours. The month records a snowfall of 1.54" (39mm), a slight reduction from January, signifying the nearing spring season. Weather in February »Weather in March
By the time March rolls around in Westerville, noticeable shifts in weather patterns herald the oncoming spring. The transition from winter to spring brings rainfall averaging 1.42" (36mm), providing growing conditions for flora. Weather in March »Weather in April
April witnesses a pronounced shift in Westerville's weather. This month is marked by a surge in precipitation, reflecting an increasing average rainfall of 1.85" (47mm) as spring takes hold. As snowfall becomes virtually non-existent, the focus shifts to rainfall providing nourishment for the blossoming greenery. Weather in April »Weather in May
May in Westerville delivers the quintessential spring weather. Volatility in atmospheric pressure stabilises as weather patterns make way for more predictable and pleasant conditions. This month receives the highest rainfall yet, about 2.32" (59mm), supporting the full bloom of Westerville's lush landscapes. Weather in May »Weather in June
The arrival of June in Westerville marks the beginning of summer. An increase in temperature and a dip in atmospheric pressure manifest into consistent weather ideal for a range of outdoor activities. While rainfall sits at 2.36" (60mm), drier days prevail, allowing residents to venture outdoors. Weather in June »Weather in July
July sets the stage for peak summer in Westerville, showcasing hot and dry days. This month experiences the city’s highest temperature averages, confirming July as the warmest month of the year in Westerville. A continued decrease in pressure and intensifying sunlight contribute to hotter days. Weather in July »Weather in August
August delivers a continuation of summer’s heat in Westerville, although with hints towards the upcoming change in season. A distinct but slight decline in temperature is witnessed, signalling the winding down of summer. Decreasing cloud cover and an average rainfall of 1.69" (43mm) points to a slow transition towards autumn. Weather in August »Weather in September
September unfolds the arrival of autumn in Westerville. The change from summer to autumn is subtly reflected through a noticeable dip in temperature and a decrease in rainfall, now averaging 1.1" (28mm). Days begin to shorten and the wind strengthens from its summer lull. Weather in September »Weather in October
October truly embodies autumn in Westerville. A perceptible drop in temperature from the previous month indicates the progression towards winter. As the city goes through late-autumn, a barely noticeable snowfall of 0.04" (1mm) is recorded. Weather in October »Weather in November
November brings Westerville closer to its winter season as drops in temperature and daylight hours become more apparent. With the first significant snowfall for the season at 0.55" (14mm), the cold starts setting in, and the city prepares for winter. Weather in November »Weather in December
December in Westerville welcomes winter once again, bookending the year with a similar chill as at its commencement. Sub-freezing temperatures signify the return of winter, while the average snowfall of 1.34" (34mm) blankets the city in a winter wonderland scenario. Weather in December »Updated: Feb 13, 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
January, noted for its average high-temperature of 32.5°F (0.3°C) and an average low-temperature of 20.7°F (-6.3°C), is considered the coldest month in Westerville.
The most humid month in Westerville is January, with an average relative humidity of 83%.
In Westerville, during the entire year, the rain falls for 149 days and collects up to 18.5" (470mm) of precipitation.
January through April, October through December are months with snowfall.
January is the month with the most snowfall. Snow falls for 11.7 days and accumulates 1.65" (42mm) of snow.
In Westerville, during the entire year, snow falls for 39.6 days and aggregates up to 6.22" (158mm) of snow.
January has the least sunshine of the year in Westerville, Ohio, with an average of 3.5h of sunshine.
The months with the lowest UV index in Westerville, Ohio, are January, February, November and December, with an average maximum UV index of 2.
February is the month with the least rainfall. Rain falls for 8.5 days and accumulates 0.98" (25mm) of precipitation.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Westerville, 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.
May through September are months without snowfall.
The months with the highest UV index are May through August, with an average maximum UV index of 6.
June is the month with the most rainfall. Rain falls for 16.8 days and accumulates 2.36" (60mm) of precipitation.
June has the longest days of the year, with an average of 15h and 0min of daylight.
Westerville's warmest month, July, generally records average temperatures ranging from a high of 82°F (27.8°C) to a low of 64.4°F (18°C).
The month with the most sunshine is August, with an average of 10.5h of sunshine.
October is the least humid month in Westerville, with an average relative humidity of 74%.
With an average of 9h and 24min of daylight, December has the shortest days of the year.
Average temperature
Westerville, OH
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (32.5°F).
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure
Westerville, OH
- Average pressure in January:
30.13"Hg - Average pressure in February:
30.1"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
29.97"Hg - Average pressure in May:
29.98"Hg - Average pressure in June:
29.94"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.99"Hg - Average pressure in September:
30.04"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.14"Hg - Average pressure in December:
30.12"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed
Westerville, OH
- Average wind speed in January:
9.7mph - Average wind speed in February:
9.5mph - Average wind speed in March:
9.1mph - Average wind speed in April:
9.3mph - Average wind speed in May:
7.5mph - Average wind speed in June:
6.8mph
- Average wind speed in July:
5.6mph - Average wind speed in August:
5.6mph - Average wind speed in September:
6.2mph - Average wind speed in October:
8mph - Average wind speed in November:
8.6mph - Average wind speed in December:
8.9mph
The windiest month (with the highest average wind speed) is January (9.7mph).
The calmest months (with the lowest average wind speed) are July and August (5.6mph).
Average humidity
Westerville, OH
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is October (74%).
Average rainfall
Westerville, OH
- Average rainfall in January:
1.06" - Average rainfall in February:
0.98" - Average rainfall in March:
1.42" - Average rainfall in April:
1.85" - Average rainfall in May:
2.32" - Average rainfall in June:
2.36"
- Average rainfall in July:
1.93" - Average rainfall in August:
1.69" - Average rainfall in September:
1.1" - Average rainfall in October:
1.46" - Average rainfall in November:
1.18" - Average rainfall in December:
1.14"
The wettest month (with the highest rainfall) is June (2.36").
The driest month (with the least rainfall) is February (0.98").
Average rainfall days
Westerville, OH
- Average rainfall days in January:
8.4 days - Average rainfall days in February:
8.5 days - Average rainfall days in March:
11.6 days - Average rainfall days in April:
15.1 days - Average rainfall days in May:
17.1 days - Average rainfall days in June:
16.8 days
- Average rainfall days in July:
16.4 days - Average rainfall days in August:
14.3 days - Average rainfall days in September:
12.2 days - Average rainfall days in October:
11.7 days - Average rainfall days in November:
7.8 days - Average rainfall days in December:
9.1 days
The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is November (7.8 days).
Average snowfall
Westerville, OH
The month with the highest snowfall is January (1.65").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Westerville, OH
- Average snowfall days in January:
11.7 days - Average snowfall days in February:
9.9 days - Average snowfall days in March:
5.3 days - Average snowfall days in April:
1.1 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:
0.1 days - Average snowfall days in November:
3.2 days - Average snowfall days in December:
8.2 days
The month with the highest number of snowfall days is January (11.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Westerville, OH
- 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:
3h and 30min - Average sunshine in February:
4h and 30min - Average sunshine in March:
6h and 6min - Average sunshine in April:
7h and 24min - Average sunshine in May:
9h and 6min - Average sunshine in June:
10h and 0min
- Average sunshine in July:
10h and 24min - Average sunshine in August:
10h and 30min - Average sunshine in September:
8h and 18min - Average sunshine in October:
6h and 12min - Average sunshine in November:
5h and 24min - Average sunshine in December:
4h and 6min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days
Westerville, OH
- Average sunshine days in January:
13.6 days - Average sunshine days in February:
11.8 days - Average sunshine days in March:
14.8 days - Average sunshine days in April:
12.5 days - Average sunshine days in May:
11.5 days - Average sunshine days in June:
10.4 days
- Average sunshine days in July:
10.8 days - Average sunshine days in August:
12.4 days - Average sunshine days in September:
15.2 days - Average sunshine days in October:
17.2 days - Average sunshine days in November:
18.8 days - Average sunshine days in December:
15.8 days
The month with the most sunshine days is November (18.8 days).
The month with the least sunshine days is June (10.4 days).
Average UV index
Westerville, OH
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
Westerville, OH
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility
Westerville, OH
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
