Climate risk in Philadelphia
Pennsylvania, United States of America · 5.5M people in the urban area
What threatens Philadelphia most
- Water stress
- Medium-High WRI Aqueduct
- Drought
- Low-Medium WRI Aqueduct
- Earthquake
- Low GSHAP
Tsunamis and landslides are not rated for a single city here. Climate risk profile of United States of America
Philadelphia is projected to be +2.7°C warmer by 2050 under moderate emissions.
New York: +2.7°C.
Philadelphia's climate in the 2050s
2041-2060 compared with 1991-2020, moderate emissions
By the 2050s, Philadelphia is projected to have the climate that Washington D.C. (United States of America) has today.
Climate risk in Washington D.C.
+1.8°C
Mean temperature over the year
+2.1°C
Highest in the warmest month
+1.8°C
Lowest in the coldest month
+3%
Precipitation over the year
Under high emissions, Philadelphia would have the climate that Memphis (United States of America) has today.
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How close the match is: 0.1 σ to the climate of Washington D.C. today, where under 2 is close and over 4 is no match (Mahony et al. 2017). 3 of 3 climate model runs name the same city. Seasonal temperature and rain are compared, not extremes, city heat or the sea.
Hazards at Philadelphia
Read at the city's centre and compared with the Atlas's 630 large cities. Moderate emissions is the IPCC's scenario SSP2-4.5.
| Hazard | Philadelphia | Among large cities | In United States of America |
|---|---|---|---|
| Hot days in 2025, over 35 °C | 7 days | Among large cities: above 54% | In United States of America: 13 of 51 |
| Tropical nights in 2025, over 20 °C | 51 days | Among large cities: above 34% | In United States of America: 28 of 51 |
| Hottest day of 2025 | 38.7°C | Among large cities: above 69% | In United States of America: 9 of 51 |
| Warming by 2050, moderate emissions | +2.7°C | Among large cities: above 95% | In United States of America: 8 of 51 |
| Days with 20 mm of rain or more in 2025 | 7 days | Among large cities: above 40% | In United States of America: 33 of 51 |
| River flood depth, 100-year event | Dry at the city centre point | ||
| Coastal flood depth, 100-year event | Dry at the city centre point | ||
| Water stress | Medium-High (20-40%) | Among large cities: above 43% | In United States of America: 18 of 48 |
| Drought risk | Low-Medium | Among large cities: above 1% | In United States of America: 17 of 48 |
| Earthquake shaking, once in 475 years | 0.44 m/s² | Among large cities: above 42% | In United States of America: 21 of 51 |
| Land burned in an average year | 0% | ||
| Cyclone wind, once in 100 years | 21.22 m/s |
Flood depth is read in a single 1 km cell at the city's centre, in today's climate. Other parts of the city can still flood. The country page names the deepest point near a coastal city in 2080, so its figure can be higher. See how deep a river flood reaches around Philadelphia on the live map
See the hot days around Philadelphia on the live map
7 days © OpenStreetMap Large cities near Philadelphia
- New York · United States of America
- Baltimore · United States of America
- Washington D.C. · United States of America
- Bridgeport · United States of America
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In a line
Source: Criora (criora.com), based on ECMWF, NEX-GDDP-CMIP6, WRI, IPCC, GSHAP, GFED500
APA
Criora. (2026). Philadelphia, United States of America: climate risk profile [Data set]. Retrieved November 2, 2026, from https://criora.com/atlas/USA/philadelphia BibTeX
@misc{criora_atlas_USA_philadelphia_2026,
author = {{Criora}},
title = {Philadelphia, United States of America: climate risk profile},
year = {2026},
url = {https://criora.com/atlas/USA/philadelphia},
urldate = {2026-11-02}
} Each reading stays under its source's terms; the sources are named on this page.
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