Climate Insights for Butler

Johnson County, Pennsylvania, United States

Hottest
July
29°C peak
Coldest
January
-5°C low
Wettest
May
149mm rain
Best to Visit
Varies throughout year

Climate Overview

The climate in Butler is temperate. The average annual temperature is 12°C and approximately 1339mm of precipitation falls per year. Butler receives a notable amount of rainfall throughout the year, including during its driest month. Butler is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are January, February, December, when temperatures can drop to -5°C. Snowfall occurs from January to December, with around 93cm accumulating over the season.

Temperature

-10° 10° 20° 30° Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Max: 3° Average: -1° Min: -5° Feb Max: 7° Average: 1° Min: -2° Mar Max: 11° Average: 6° Min: 1° Apr Max: 17° Average: 11° Min: 6° May Max: 22° Average: 16° Min: 12° Jun Max: 26° Average: 21° Min: 16° Jul Max: 29° Average: 23° Min: 19° Aug Max: 27° Average: 22° Min: 18° Sep Max: 25° Average: 19° Min: 14° Oct Max: 18° Average: 13° Min: 9° Nov Max: 11° Average: 6° Min: 2° Dec Max: 5° Average: 1° Min: -2°
Max
Average
Min

Temperatures in Butler vary considerably across the year, with a 34°C difference between the coldest and warmest months. The warmest month is July, when average highs reach 29°C and the mean temperature sits around 23°C. The coldest month is January, when overnight lows fall to -5°C and the daily average is -1°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 7°C shift in average temperatures.

Precipitation

0mm 25mm 50mm 75mm 100mm 125mm 150mm Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Precipitation: 104mm Snow: 28mm Feb Precipitation: 109mm Snow: 23mm Mar Precipitation: 108mm Snow: 11mm Apr Precipitation: 123mm Snow: 5mm May Precipitation: 149mm Snow: 0mm Jun Precipitation: 132mm Snow: 0mm Jul Precipitation: 119mm Snow: 0mm Aug Precipitation: 100mm Snow: 0mm Sep Precipitation: 104mm Snow: 0mm Oct Precipitation: 109mm Snow: 0mm Nov Precipitation: 85mm Snow: 7mm Dec Precipitation: 96mm Snow: 19mm
Precipitation
Snow

Butler is a fairly wet location, receiving approximately 1339mm of precipitation annually, which averages out to around 112mm per month. The wettest month is May, averaging 149mm of rainfall. June and April also tend to see above-average precipitation. The driest month is November, with just 85mm. That's 64mm less than May, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Snowfall is a regular feature from January to December, with around 93cm accumulating over the season. January typically sees the most snow at around 28cm.

Wind

0km/h 5km/h 10km/h 15km/h Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Wind Speed: 12km/h Feb Wind Speed: 13km/h Mar Wind Speed: 13km/h Apr Wind Speed: 12km/h May Wind Speed: 10km/h Jun Wind Speed: 10km/h Jul Wind Speed: 8km/h Aug Wind Speed: 8km/h Sep Wind Speed: 9km/h Oct Wind Speed: 11km/h Nov Wind Speed: 12km/h Dec Wind Speed: 12km/h
Wind Speed

Butler is relatively calm, with an average annual wind speed of 11km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is March, averaging 13km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 8km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 5km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 12km/h in winter, 12km/h in spring, 9km/h in summer, 11km/h in autumn.

Seasons

Winter
Dec 21
Spring
Mar 20
Summer
Jun 21
Autumn
Sep 23

8 days until Autumn

It is currently summer in Butler, which began on June 21, 2026. Butler is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in July at around 29°C, while the coldest stretch bottoms out in January near -5°C. Autumn is next, beginning on September 23, 2026 (8 days from now).

Spring

Temperatures range from 1 to 22°C. Rainfall is heavy, totalling around 380mm across the season with a monthly average of 127mm. Winds are generally light, averaging 12km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.

Summer

Temperatures range from 16 to 29°C. Rainfall is heavy, totalling around 352mm across the season with a monthly average of 117mm. Winds are generally light, averaging 9km/h. Light, breathable clothing is ideal. Perfect conditions for outdoor activities.

Autumn

Temperatures range from 2 to 25°C. Precipitation is moderate at around 299mm for the season, averaging 100mm per month. Expect around 7cm of snow accumulation during this period. Winds are generally light, averaging 11km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.

Winter

Temperatures range from -5 to 7°C. Rainfall is heavy, totalling around 309mm across the season with a monthly average of 103mm. Expect around 70cm of snow accumulation during this period. Winds are generally light, averaging 12km/h. Warm winter clothing and waterproof boots are a must, and travel may be affected by snow.

Monthly Climate Data

The table below shows monthly climate averages for Butler based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.

Month
Min Temperature
Max Temperature
Wind Speed
Precipitation
Snow
Jan
-5 °C
3 °C
12 km/h
104 mm
28 cm
Feb
-2 °C
7 °C
13 km/h
109 mm
23 cm
Mar
1 °C
11 °C
13 km/h
108 mm
11 cm
Apr
6 °C
17 °C
12 km/h
123 mm
5 cm
May
12 °C
22 °C
10 km/h
149 mm
0 cm
Jun
16 °C
26 °C
10 km/h
132 mm
0 cm
Jul
19 °C
29 °C
8 km/h
119 mm
0 cm
Aug
18 °C
27 °C
8 km/h
100 mm
0 cm
Sep Current
14 °C
25 °C
9 km/h
104 mm
0 cm
Oct
9 °C
18 °C
11 km/h
109 mm
0 cm
Nov
2 °C
11 °C
12 km/h
85 mm
7 cm
Dec
-2 °C
5 °C
12 km/h
96 mm
19 cm
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Metric (°C, km/h)