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Contents
- The climate of Dayton
- The best time to visit Dayton
- The worst time to visit Dayton
- Spring weather in Dayton
- Summer weather in Dayton
- Autumn weather in Dayton
- Winter weather in Dayton
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
The Maimi and Mad rivers converge to flow through Dayton city, Ohio
The climate of Dayton
Residing within the latitudes that mark the Humid subtropical zone, Dayton, Ohio follows the Köppen climate classification of Cfa. With no dry season to be noted, rainfall is a consistent presence throughout the year. Monthly weather conditions in this region swing between the highs and lows of temperature, humidity, and rainfall.
Observing the temperatures for each month exposes wide variance. The highest average highs of 81.3°F (27.4°C) and 80.2°F (26.8°C) occur during July and August. By contrast, the coldest months are January and February, with average lows hitting 21.7°F (-5.7°C) and 24.6°F (-4.1°C) respectively.
Rainfall figures show no significant divergence throughout the year as Dayton receives constant precipitation. A slight peak in May at 3.35" (85mm) indicates the highest amount of rainfall while the least is witnessed in September with 1.5" (38mm).
Used to higher humidity, Dayton experiences the highest relative humidity at 82% in January, February, and December. Snowfall is a typical feature of the winter season from December to February, with January experiencing the highest snowfall at 2.05" (52mm). Weather patterns are accompanied by varying daylight hours from 9.4h in December to 15h in June, and UV index constant through the year, with a peak of 6 during the summer months.
Observing the temperatures for each month exposes wide variance. The highest average highs of 81.3°F (27.4°C) and 80.2°F (26.8°C) occur during July and August. By contrast, the coldest months are January and February, with average lows hitting 21.7°F (-5.7°C) and 24.6°F (-4.1°C) respectively.
Rainfall figures show no significant divergence throughout the year as Dayton receives constant precipitation. A slight peak in May at 3.35" (85mm) indicates the highest amount of rainfall while the least is witnessed in September with 1.5" (38mm).
Used to higher humidity, Dayton experiences the highest relative humidity at 82% in January, February, and December. Snowfall is a typical feature of the winter season from December to February, with January experiencing the highest snowfall at 2.05" (52mm). Weather patterns are accompanied by varying daylight hours from 9.4h in December to 15h in June, and UV index constant through the year, with a peak of 6 during the summer months.
The best time to visit Dayton
On taking into consideration the climatological parameters, it becomes clear July and August tend to provide the most agreeable conditions for a visit to Dayton, Ohio. It is during these months that the city experiences its highest temperatures, averaging between 80.2°F (26.8°C) to 81.3°F (27.4°C). Moreover, humidity is at a manageable level during these months plus daylight extends up to 14.7 hours per day in July and 13.7 hours per day in August. The UV index of 6 in these months ensures ample sunshine, accompanied by 10.2 hours of daily sunshine.
The worst time to visit Dayton
For those who are not partial to low temperatures, the peak winter months from December to February may not be the ideal time to visit Dayton. These months see snowfall, with January experiencing the highest at 2.05" (52mm). Average temperatures drop from 21.7°F (-5.7°C) to 24.6°F (-4.1°C) while humidity edges towards the higher side, touching 82% in January and February. Daylight hours are at a minimum, with December having just 9.4 hours per day.
Spring weather in Dayton
Spring in Dayton is marked by a significant change in weather patterns from March to May. The temperature gets progressively warmer, moving from an average high of 49.5°F (9.7°C) in March to 71.2°F (21.8°C) in May. Correspondingly, the humidity remains relatively constant, dropping marginally from 76% in March to 79% in May. Spring also witnesses an increase in rainfall from 1.97" (50mm) to a high of 3.35" (85mm) in May, the latter being the highest yearly rainfall.
Summer weather in Dayton
June to August marks the summer season in Dayton. This period sees the warmest weather with temperatures fluctuating from an average high of 78.4°F (25.8°C) in June to reach a zenith of 81.3°F (27.4°C) in July before falling slightly to 80.2°F (26.8°C) in August. Humidity remains constant at 79% in June and July before dipping slightly to 81% in August. The rainfall shows a drop from 2.4" (61mm) in June to 2.09" (53mm) in July and further to 1.93" (49mm) in August.
Autumn weather in Dayton
With the onset of autumn from September to November, Dayton prepares for cooler weather. The temperature drops progressively from an average high of 75°F (23.9°C) in September to 49.1°F (9.5°C) in November. This period sees lower rainfall, falling from 1.5" (38mm) to 1.61" (41mm) in October and again to 1.5" (38mm) in November. Humidity and daylight hours decrease, signaling the approach of winter.
Winter weather in Dayton
From December to February, Dayton plunges into winter. The temperature dips from an average high of 39.2°F (4°C) in December to 33.6°F (0.9°C) in January before picking up slightly to 37.9°F (3.3°C) in February. Notably, this is a period of high humidity, with figures rising from 82% in December to a similar level in February. These colder months also bring snowfall, peaking at 2.05" (52mm) in January.
Weather in January
January brings a fresh start to Dayton, Ohio, accompanied by moderate cold and significant precipitation. The city often experiences snowy conditions this month, with temperatures dipping to a chilly 21.7°F (-5.7°C). The daylight hours are comparatively shorter, resulting in cooler days. Weather in January »
Weather in February
February ushers in slightly warmer weather in Dayton. A moderate rise in temperature from the chill of January is evident, but with continued wintry conditions. The city sees a decrease in snowfall, suggesting a transition into spring in the upcoming months. Weather in February »
Weather in March
March marks the onset of spring in Dayton, Ohio. The city experiences a substantial increase in temperature, reducing the intensity of winter. Daylight extends, a herald of sunnier days ahead. The month brings increased precipitation and relative humidity, preparing the ground for spring blossoms. Weather in March »
Weather in April
April in Dayton witnesses a robust spring season. As winter dissipates, the warmer temperatures become more consistent and the city sees a reduction in snowfall. The extended sunshine hours and mild temperature make for pleasant days. Weather in April »
Weather in May
Dayton in May is characterized by the bliss of summer and the fading touch of spring. The city experiences longer daylight hours and increased warmth. It is a time for residents to indulge in outdoor activities. However, the month is associated with substantial precipitation. Weather in May »
Weather in June
June stands as a testament to the warm, summer season in Dayton. The city experiences long hours of daylight, favoring abundant outdoor activities. The humidity doesn’t reach unbearable levels yet, ensuring comfort for residents. However, frequent rainfall marks this month. Weather in June »
Weather in July
July brings the real heat of summer to Dayton, Ohio. This month experiences the highest temperature, often causing discomfort to inhabitants. Despite the heat, a moderate level of humidity and rainfall keep the city green. The long hours of sunshine characterize this month, ensuring a vibrant outdoor atmosphere. Weather in July »
Weather in August
August in Dayton is a period of transition from peak summer towards the cooler months. While still hot, the temperature gradually decreases, bringing some relief to the city's residents. The humidity level remains relatively high although sunshine hours start to diminish. Weather in August »
Weather in September
September marks the advent of fall in Dayton. The city's weather starts cooling significantly, providing a welcome relief from the summer heat. The daylight hours shorten, indicating a transitional phase. September also sees reduced rainfall, making it a preferable time for outdoor activities. Weather in September »
Weather in October
October carries on the fall spirit in Dayton, Ohio. The weather strikes a balance between warmth and coolness, making it an ideal time for locals. The month witnesses a decline in both temperature and rainfall. The change in foliage colors and crisp air makes it a visual treat for spectators. Weather in October »
Weather in November
November in Dayton brings a notable decrease in temperature. The city embraces early signs of winter, with falling leaves and shorter days. The amount of rainfall remains steady, adding to the overall coolness. As the month progresses, warmth gives way to the creeping cold of the forthcoming winter. Weather in November »
Weather in December
December in Dayton, Ohio, is characterized by wintry conditions. The city feels the chill of winter, with short days and long nights in store. Apart from the cold, the city also experiences increased snowfall and brisk winds, adding to the overall winter charm. Weather in December »
Updated: Aug 2, 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
What part of the year is the coldest?
In Dayton, January registers the lowest temperatures, averaging 33.6°F (0.9°C) at the peak and 21.7°F (-5.7°C) at the lowest.
What is the most humid month?
January, February and December, with an average relative humidity of 82%, are most humid months.
How much does it rain?
Throughout the year, there are 149.5 rainfall days, and 23.9" (607mm) of precipitation is accumulated.
When does it snow?
January through April, October through December are months with snowfall.
What is the snowiest month?
The month with the most snowfall is January, when snow falls for 8.2 days and typically aggregates up to 2.05" (52mm) of snow.
How much does it snow?
In Dayton, during the entire year, snow falls for 26.5 days and aggregates up to 7.68" (195mm) of snow.
What is the month with the least sunshine?
January has the least sunshine of the year, with an average of 3.7h of sunshine.
When is the lowest UV index?
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
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 wettest month?
May is the month with the most rainfall. Rain falls for 18.8 days and accumulates 3.35" (85mm) of precipitation.
When it does not snow in Dayton?
May through September are months without snowfall.
When are the longest days?
With an average of 14h and 54min of daylight, June has the longest days of the year.
What are the months with the most sunshine?
June and July, with an average of 10.2h of sunshine, are months with the most sunshine.
What are the months with the highest UV index?
The months with the highest UV index in Dayton are June through August, with an average maximum UV index of 6.
What are the warmest months?
July registers as the month with the average highest temperatures, reaching 81.3°F (27.4°C) at its peak and 64.9°F (18.3°C) at the lowest.
What is the driest month?
The months with the least rainfall are September and November Rain falls for 12.5 days and accumulates 1.5" (38mm) of rain.
What is the least humid month?
With an average relative humidity of 74%, October is the least humid month.
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 in Dayton.
Average temperature
Dayton, OH
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (33.6°F).
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (21.7°F).
Average pressure
Dayton, 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:
29.96"Hg - Average pressure in May:
29.98"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.03"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 (29.93"Hg).
Average wind speed
Dayton, OH
- Average wind speed in January:
10mph - Average wind speed in February:
9.9mph - Average wind speed in March:
9.4mph - Average wind speed in April:
9.6mph - Average wind speed in May:
7.7mph - Average wind speed in June:
7mph
- Average wind speed in July:
5.8mph - Average wind speed in August:
5.7mph - Average wind speed in September:
6.3mph - Average wind speed in October:
8.1mph - Average wind speed in November:
8.8mph - Average wind speed in December:
9.2mph
The windiest month (with the highest average wind speed) is January (10mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity
Dayton, OH
The months with the highest relative humidity are January, February and December (82%).
The month with the lowest relative humidity is October (74%).
Average rainfall
Dayton, OH
- Average rainfall in January:
1.57" - Average rainfall in February:
1.61" - Average rainfall in March:
1.97" - Average rainfall in April:
2.56" - Average rainfall in May:
3.35" - Average rainfall in June:
2.4"
The wettest month (with the highest rainfall) is May (3.35").
The driest months (with the least rainfall) are September and November (1.5").
Average rainfall days
Dayton, OH
- Average rainfall days in January:
7.7 days - Average rainfall days in February:
7.5 days - Average rainfall days in March:
11.9 days - Average rainfall days in April:
15.5 days - Average rainfall days in May:
18.8 days - Average rainfall days in June:
15.1 days
- Average rainfall days in July:
16.3 days - Average rainfall days in August:
14.2 days - Average rainfall days in September:
12.5 days - Average rainfall days in October:
11.5 days - Average rainfall days in November:
9.1 days - Average rainfall days in December:
9.4 days
The month with the highest number of rainy days is May (18.8 days).
The month with the least rainy days is February (7.5 days).
Average snowfall
Dayton, OH
The month with the highest snowfall is January (2.05").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Dayton, OH
- Average snowfall days in January:
8.2 days - Average snowfall days in February:
6.6 days - Average snowfall days in March:
3.3 days - Average snowfall days in April:
0.7 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:
1.7 days - Average snowfall days in December:
5.9 days
The month with the highest number of snowfall days is January (8.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Dayton, OH
- Average daylight in January:
9h and 4min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 2min - Average daylight in June:
14h and 5min
- Average daylight in July:
14h and 4min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January:
3h and 4min - Average sunshine in February:
4h and 5min - Average sunshine in March:
6h and 1min - Average sunshine in April:
7h and 4min - Average sunshine in May:
9h and 0min - Average sunshine in June:
10h and 1min
- Average sunshine in July:
10h and 1min - Average sunshine in August:
10h and 1min - Average sunshine in September:
8h and 2min - Average sunshine in October:
6h and 4min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 1min
The months with the most sunshine are June and July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Dayton, OH
- Average sunshine days in January:
16.3 days - Average sunshine days in February:
14.9 days - Average sunshine days in March:
15.4 days - Average sunshine days in April:
12.7 days - Average sunshine days in May:
9.8 days - Average sunshine days in June:
11.1 days
- Average sunshine days in July:
11.8 days - Average sunshine days in August:
13.8 days - Average sunshine days in September:
16.1 days - Average sunshine days in October:
18.2 days - Average sunshine days in November:
18.9 days - Average sunshine days in December:
16.7 days
The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is May (9.8 days).
Average UV index
Dayton, OH
The months with the highest UV index are 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
Dayton, OH
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility
Dayton, OH
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).
Dayton, Ohio, USA
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