August weather forecastWesterville, OH
August
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. Despite the enduring heat, Westerville's residents can expect slightly cooler early mornings and evenings. The wind speed follows the same pattern as July, providing a sense of uniformity in climatic conditions.Temperature
With the onset of August, the average high-temperature registers at a still warm 81°F (27.2°C), subtly different from July's 82°F (27.8°C). Westerville reports a consistent average low-temperature of 62.4°F (16.9°C) throughout August nights.Heat index
August's average heat index is appraised at a hot 86°F (30°C). Enduring exposure and continuous activity might cause a feeling of tiredness and induce heat cramps.Heat index readings emphasize conditions of light breezes and shaded spots. The heat index has the possibility to be enhanced by 15 Fahrenheit (8 Celsius) degrees when there is direct sun exposure.
Note: The heat index, also known as 'feels like' or 'felt air temperature', measures the perceived warmth when incorporating the humidity present in the air. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
Humidity
In August, the average relative humidity in Westerville, Ohio, is 76%.Rainfall
In August, in Westerville, the rain falls for 14.3 days. Throughout August, 1.69" (43mm) of precipitation is accumulated. In Westerville, during the entire year, the rain falls for 149 days and collects up to 18.5" (470mm) of precipitation.Snowfall
In Westerville, snow does not fall in May through September.Daylight
The average length of the day in August is 13h and 43min.On the first day of the month, sunrise is at 6:30 am and sunset at 8:45 pm. On the last day of August, in Westerville, Ohio, sunrise is at 6:59 am and sunset at 8:04 pm EDT.
Sunshine
August has the most sunshine of the year in Westerville, with an average of 10.5h of sunshine.UV index
The months with the highest UV index in Westerville are May through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: In August, an average UV index of 6 transforms into the following instructions:
Guard against overexposure. Protection from sun-induced harm is essential. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Westerville, OH
- Average high temperature in August: 81°F
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).
- Average low temperature in August: 62.4°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 in August
Westerville, OH
- Average pressure in August: 29.99"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 in August
Westerville, OH
- Average wind speed in August: 5.6mph
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 in August
Westerville, OH
- Average humidity in August: 76%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is October (74%).
Average rainfall in August
Westerville, OH
- Average rainfall in August: 1.69"
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 in August
Westerville, OH
- Average rainfall days in August: 14.3 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 in August
Westerville, OH
- Average snowfall in August: 0"
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 in August
Westerville, OH
- Average snowfall days in August: 0 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 in August /
Average sunshine in August
Westerville, OH
- Average daylight in August: 13h and 42min
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 August: 10h and 30min
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 in August
Westerville, OH
- Average sunshine days in August: 12.4 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 in August
Westerville, OH
- Average UV index in August: 6
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 in August
Westerville, OH
- Average cloud cover in August: 29
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 in August
Westerville, OH
- Average visibility in August: 6mi
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).
