Hummelstown (PA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Hummelstown.
Climate overview of Hummelstown
The climate in Hummelstown, Pennsylvania, United States of America, is marked by large temperature swings across the seasons, ranging from 30°C (86°F) in July to 3°C (37°F) in January.
The city has a wet climate, receiving around 1221 mm (48 in) of rain/snowfall per year. Despite the high annual total, it has warm summers and cold winters. September is the wettest month. The most sunshine falls in July, with an average of 10.3 hours of daily sunshine.
Hummelstown Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Hummelstown - and find the best time to visit.
Monthly Temperature in Hummelstown
In Hummelstown, temperatures differ significantly between summer and winter months. On average, daytime temperatures range from a comfortable 30°C (86°F) in July to a chilly 3°C (37°F) in January.
Nighttime temperatures range from 19°C (66°F) in July to -6°C (21°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Hummelstown
Hummelstown experiences significant rain/snowfall throughout the year, averaging 1221 mm (48 in) of precipitation annually. The amount of precipitation varies moderately throughout the year. The wettest month, September, sees around 140 mm (5.5 in) of rainfall, perfect for those who enjoy a bit of rain now and then. The driest month, November, still receives a respectable 66 mm (2.6 in) of rainfall. For more details, please visit our Hummelstown Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Hummelstown
In Hummelstown, summer days are longer and more sunny, with daily sunshine hours peaking at 10.3 hours in July. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 4.2 hours per average day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Hummelstown by Month
The relative humidity is high throughout the year in Hummelstown.
The city experiences its highest humidity in September, reaching 73%. In April, the humidity drops to its lowest level at 59%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Hummelstown
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May, June, August and September
- Warmest weather: July and August
- Most sunshine: July
- Seasonal pattern: Warm summers and cold winters
- Coldest conditions: January, with freezing nights around -6°C (21°F).
Frequently asked questions about the climate in Hummelstown
What is the best time to visit Hummelstown?
May, June, August and September typically offer the most optimal weather in Hummelstown. In contrast, January, February and December tend to have less optimal conditions. Hummelstown has warm summers and cold winters.
What temperatures can I expect in Hummelstown?
Daytime highs range from 3°C (37°F) in January to 30°C (86°F) in July. Nighttime lows range from -6°C (21°F) to 19°C (66°F). Temperatures vary considerably through the year.
How much rain does Hummelstown get?
Annual rainfall is around 1221 mm (48 in). September is the wettest month with 140 mm (5.5 in), while November is the driest with 66 mm (2.6 in).
How sunny is Hummelstown?
Hummelstown receives around 2,609 hours of sunshine per year. July is the sunniest month with 310 hours, while December is the cloudiest with just 126 hours. Overall, Hummelstown enjoys abundant sunshine.
Hummelstown 3-Day Forecast
Hummelstown on the map
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