Philadelphia climate
Philadelphia’s mild summer and cold winter shape the retirement year
Philadelphia’s published climate rows show Good overall comfort, Very Good summer feel, a Mild 84°F average summer high, Moderate winter feel, and a 27°F average winter low. Humidity is 79 percent, six months are comfortable, solar exposure is 1,420 peak sun hours per year, and January, February, and December are toughest.
Air quality is Excellent at 4.4 out of 5 and long term fine particle pollution is Good at 8.5 micrograms per cubic meter for the 2021 to 2025 modeled average. The displayed rows list Poor allergy levels, Low climate heat risk, Low drought risk, and Moderate weather volatility. The separate safety hazard ledger lists High heat risk, so the home plan needs both summer comfort and hazard preparation.
Living through the seasons
Summers are the easier season. Winter comfort deserves a closer look.
- Overall Comfort
- Good
2.9 / 5
- Average Summer High
- 84°F
- Days Above 90°F
- 17 days/year
- Summer Feel
- Very Good
Mild · 84°F
Excellent
4.1 / 5
- Average Winter Low
- 27°F / -3°C
- Days Below Freezing
- 101 days/year
- Winter Feel
- Moderate
Fair
Fair
1.9 / 5
The shape of the year
Humidity, comfortable months, and sunshine show how the seasons differ.
- Humidity
- 79%
- Comfortable Months
- 6 months
- Solar Exposure
- 1420 peak sun hrs/yr
Good
Fair
Poor
Air, allergies, and weather
Air quality and allergies shape day to day comfort. The best months and weather risks help with timing.
Air and allergies
- Air Quality
- Excellent
- Allergy Levels
- Poor
4.4 / 5
Current AQI
Checking…
Current PM2.5
Checking…
Timing and weather
- Long Term Fine Particle Pollution
- 8.5 µg/m³ 2021-2025 modeled average
- Best Months
- May, Jun, Jul, Aug, Sep, Oct
- Toughest Months
- Jan, Feb, Dec
- Heat Risk
- Low
- Drought Risk
- Low
- Weather Volatility
- Moderate
Good · 8.5 µg/m³ 2021-2025 modeled average
Very Good
3.2 / 5
Philadelphia in everyday life
Could Philadelphia work for you?
What may work well
- The published rows show a Mild 84°F average summer high, six comfortable months, Excellent air quality, Low climate heat risk, and Low drought risk.
- Philadelphia’s parks, trails, recreation centers, historic places, and cultural sites support an outdoor and indoor calendar.
- The 2021 to 2025 modeled pollution average is labeled Good at 8.5 micrograms per cubic meter.
- The climate ledger gives clear planning prompts for winter cold, allergies, humidity, storms, heating, cooling, and home comfort.
What to think about
- The average winter low is 27°F and January, February, and December are toughest months.
- Humidity is 79 percent and allergy levels are Poor, so mild summer conditions do not answer questions about personal comfort.
- The climate ledger lists Low heat risk while the separate safety hazard ledger lists High heat risk.
- Weather volatility is Moderate, so published averages should not be treated as a promise about one home or season.
Plan around Philadelphia’s shoulder seasons and winter edge
Visit in winter and summer
Notice heating, cooling, windows, humidity, allergies, shade, lighting, sidewalks, transit arrival, parking, and how the home feels after a cold or warm day.
Price home comfort
Review heating, cooling, insulation, windows, air conditioning, utilities, insurance, maintenance, power, shade, and storm preparation.
Choose indoor alternatives
Identify recreation centers, pools, cultural places, parks, trails, libraries, home activities, and nearby options for Poor allergy days, rain, cold, storms, or heat.
Keep both heat rows visible
Use the Low climate heat row and separate High safety hazard heat row alongside the 84°F summer high, 27°F winter low, 79 percent humidity, and six comfortable months.
Questions retirees ask
What is Philadelphia’s summer weather like?
The published average summer high is Mild at 84°F, with Very Good summer feel and Low heat risk in the climate ledger. Humidity is 79 percent and allergy levels are Poor, while the separate safety hazard ledger lists High heat risk.
Does Philadelphia have cold winters?
Winter feel is Moderate and the average winter low is 27°F. January, February, and December are toughest, so heating, insulation, lighting, sidewalks, transit arrival, and indoor alternatives deserve attention.
Is Philadelphia humid?
Humidity is published as 79 percent. Review ventilation, windows, air conditioning, heating, moisture, and the home’s comfort after rain, cold, or a warm day.
What are the best months in Philadelphia?
Six months are listed as comfortable. January, February, and December are the toughest months, while outdoor plans should be arranged around parks, trails, allergies, storms, heat, winter cold, and the exact home.
What do the air quality rows mean for Philadelphia?
Air quality is labeled Excellent at 4.4 out of 5, while long term fine particle pollution is labeled Good at 8.5 micrograms per cubic meter for the 2021 to 2025 modeled average. Allergy levels are Poor, so use both labels when planning personal comfort.
Philadelphia offers a manageable summer pattern and six comfortable months, while winter cold, allergies, humidity, storms, heat, and the actual home determine comfort. For Philadelphia’s climate plan, choose Save, Compare, or Find my fit.
Sources
Climate comfort helps estimate how practical daily life may feel across the year, especially for heat, humidity, cold, and seasonal constraints.
Seasonal timing, health conditions, air conditioning, air quality, and elevation can change the lived experience.
- NASA POWER
Used for Overall Comfort, Summer Feel, Average Summer High, Days Above 90°F, Winter Feel, Average Winter Low, Days Below Freezing, Humidity, Comfortable Months, Solar Exposure, Best Months, Toughest Months, Allergy Levels, Heat Risk, Weather Volatility
- Open-Meteo / Copernicus CAMS, checked against U.S. EPA AirData
Used for Air Quality, Long-Term Fine-Particle Pollution
Checked 2026-05-18
- Federal Emergency Management Agency National Risk Index
Used for Drought Risk
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