Smithfield (zip 15478), Pennsylvania Weather

The most pleasant months of the year for the 15478 zip code are September, June and May. In the 15478 zip code, there are 5 comfortable months with high temperatures in the range of 70-85°. July is the hottest month for the 15478 zip code with an average high temperature of 84.9°, which ranks it as warmer than most places in Pennsylvania. January is the snowiest month in the 15478 zip code with 7.9 inches of snow, and 6 months of the year have significant snowfall. July is the most humid month, though humidity is low for most of the year.

Weather Highlights

Summer High: the July high is around 85 degrees
Winter Low: the January low is 20
Rain: averages 42 inches of rain a year
Snow: averages 24 inches of snow a year

BESTPLACES COMFORT INDEX

The annual BestPlaces Comfort Index for the Smithfield (zip 15478) area is 8.8 (10=best), which means it is more comfortable than most places in Pennsylvania.

8.8 / 10

A higher score indicates a more comfortable year-round climate. The US average for the comfort index is 7.8. Our index is based on the total number of days annually within the comfort range of 70-80 degrees, and we also applied a penalty for days of excessive humidity.

Average Monthly High and Low (°F)

	High	Low
January	39°	20°
February	43°	22°
March	52°	28°
April	64°	37°
May	73°	47°
June	82°	57°
July	85°	62°
August	84°	60°
September	77°	53°
October	65°	41°
November	54°	32°
December	42°	24°

Hot, Freezing, Rainy, Snowy Days: Smithfield

	Hot Days	Freezing Days	Rainy Days	Snowy Days
January	0	27	16	5
February	0	24	13	4
March	0	21	13	2
April	0	9	14	0
May	1	1	14	0
June	4	0	12	0
July	6	0	11	0
August	5	0	10	0
September	1	0	10	0
October	0	5	10	0
November	0	15	12	1
December	0	25	15	3

YOU SHOULD KNOW

Many people confuse weather and climate but they are different. Weather is the conditions of the atmosphere over a short period of time, and climate is how the atmosphere is over long periods of time.

Weather is how the atmosphere is behaving and its effects upon life and human activities. Weather can change from minute-to-minute. Most people think of weather in terms of temperature, humidity, precipitation, cloudiness, brightness, visibility, wind, and atmospheric pressure.

Climate is the description of the long-term pattern of weather in a place. Climate can mean the average weather for a particular region and time period taken over 30 years. Climate is the average of weather over time.

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Zip 15478 (Smithfield, PA) Weather