Philadelphia Historic Weather Records

Analyse hottest, coldest, windiest & wettest days

Philadelphia Weather Trend Graph


Temperature (°C)
.
Months
Max Temp.
Historic Max Temp.
Min Temp.
Historic Min Temp.

Yearly Summary 2026


43°C
Highest Temp
2 Jul. 26

-15°C
Lowest Temp
31 Jan. 26


Seasonal Breakdown

Hottest MonthJuly33.26°C

Coldest MonthJanuary-4.85°C

Wettest MonthFebruary9.62mm

Windiest MonthMarch20.06km/h

Frequently Asked Questions


1. What is the hottest month in Philadelphia historically?

July is historically Philadelphia's hottest month, with average maximum temperatures around 31°C. During peak heatwave events, the highest recorded temperatures have reached 43°C on 2026-07-02.

2. What is the coldest month in Philadelphia historically?

January is Philadelphia's coldest month, with average minimum temperatures around -3°C. The all-time record low of -19°C was recorded on 2018-01-07.

3. What is the average annual rainfall in Philadelphia over the past 17 years?

Philadelphia's average annual rainfall is approximately 1317.5mm, based on records spanning 17 years.

4. How many rainy days does Philadelphia experience on average per year?

Philadelphia historically records approximately 167.8 rainy days per year. June has the highest number of rain days at an average of 14.9 days.

5. What is the all-time highest temperature ever recorded in Philadelphia?

The all-time highest temperature recorded in Philadelphia is 43°C on 2026-07-02.

6. What is the all-time lowest temperature ever recorded in Philadelphia?

The all-time lowest temperature recorded in Philadelphia is -19°C on 2018-01-07.

7. What is the windiest time of year in Philadelphia historically?

Philadelphia experiences its strongest winds during March. The historic gust record of 57.6 kph was recorded on 2012-10-29.

8. What is the highest and lowest humidity in Philadelphia during a year?

Usually, Philadelphia's humidity peaks in February at around 74.3% and drops to its lowest in April at approximately 67.08%.