Philadelphia
Decide whether to visit or live in Philadelphia, then explore current conditions, local people, the map, and concise sourced context.
Check visit & living safetyUpdated Tuesday, September 15, 2026 · sourced live layer and versioned editorial content
AI-assisted, evidence-constrained research · how this page is made
Would you visit or live in Philadelphia?
Choose your plan and circumstances. The result changes immediately using today's advisory, weather, air-quality, and sourced local signals.
Generally suitable with routine precautions
Review current official guidance before travelling.
high source confidence · current planning signal, not a personal-safety guaranteeSee the evidence and calculation
- No high-severity wording detected in the supplied advisory
- Latest air-quality reading is not elevated
The score combines dated official-advisory wording, weather, air quality, sourced local context, and your selections. It does not predict crime or individual outcomes. Check local authorities and professional advice before a safety-critical decision.
Climate normals · 2016–2025
When to go: Philadelphia month by month
Judged purely on 2016–2025 weather records, the friendliest months in Philadelphia are typically May, September and October, with average daytime highs around 20–26°C. July is usually the warmest month (average high 31°C), January the coldest (average low -2°C), and May the wettest (about 126 mm). These are long-run averages, not a forecast.
| Month | Avg high (°C) | Avg low (°C) | Rain (mm) | Sunshine (h/day) |
|---|---|---|---|---|
| January | 5.5 | -2.3 | 87 | 6.1 |
| February | 8.4 | -0.9 | 90 | 6.8 |
| March | 12.4 | 2.0 | 107 | 8.1 |
| April | 17.9 | 7.2 | 108 | 8.8 |
| May | 22.7 | 12.5 | 126 | 9.3 |
| June | 28.2 | 17.8 | 97 | 11.1 |
| July | 31.1 | 21.5 | 124 | 11.6 |
| August | 29.5 | 20.3 | 113 | 10.6 |
| September | 26.2 | 17.0 | 103 | 8.9 |
| October | 20.3 | 11.2 | 97 | 7.9 |
| November | 13.1 | 4.2 | 79 | 7.5 |
| December | 7.5 | -0.3 | 102 | 5.9 |
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People and places shaping Philadelphia
AI-assisted local research, regenerated with the dated live layer. Every requested module remains visible; facts appear only after a source check, and unavailable categories explain what is still being researched.
Research updated Monday, September 14, 2026Past and future events in Philadelphia
Upcoming
No future event in Philadelphia currently has a sufficiently reliable date and source. This is checked again on every refresh.
Previously
- Founding of Philadelphia
Philadelphia was founded in 1682 by William Penn as a Quaker colony promoting religious freedom.
- Declaration of Independence adopted
The Continental Congress adopted the Declaration of Independence on July 4, 1776 inside Independence Hall.
- 1793 Yellow Fever Epidemic
The largest yellow fever epidemic in U.S. history struck Philadelphia in 1793, killing about 4,000–5,000 residents.
- 1985 MOVE bombing
Philadelphia police bombed the Cobbs Creek neighborhood to arrest MOVE members, killing 11 people and destroying 61 homes.
- Population growth reversal (2007‑present)
After decades of decline, Philadelphia’s population began increasing again in 2007 and has continued to grow.
Sources checked (2)
Interactive geography
See Philadelphia in context
Keep the deeper context
Stable history, culture, districts, and practical reference remain in the main reading flow while the live layers above continue changing.
01 · OverviewPhiladelphia, in brief
Philadelphia is mapped here through verified geographic facts and source-linked daily data. Its longer editorial profile is in the enrichment queue.
02 · HistoryHow Philadelphia took shape
This section is being expanded from verified sources. Current facts, weather, mapping, and official links remain available while editorial review continues.
03 · VisitVisiting Philadelphia
This section is being expanded from verified sources. Current facts, weather, mapping, and official links remain available while editorial review continues.
04 · Food & cultureFood and everyday culture in Philadelphia
This section is being expanded from verified sources. Current facts, weather, mapping, and official links remain available while editorial review continues.
05 · ArtsArts and cultural life in Philadelphia
This section is being expanded from verified sources. Current facts, weather, mapping, and official links remain available while editorial review continues.
06 · EconomyWork and the economy in Philadelphia
This section is being expanded from verified sources. Current facts, weather, mapping, and official links remain available while editorial review continues.
07 · SafetySafety and practical guidance for Philadelphia
This section is being expanded from verified sources. Current facts, weather, mapping, and official links remain available while editorial review continues.
08 · QuestionsQuestions about Philadelphia
This section is being expanded from verified sources. Current facts, weather, mapping, and official links remain available while editorial review continues.
Frequently Asked Questions about Philadelphia
Essential geographic, demographic, currency, and travel context verified from primary records.
01 · Q&AWhere is Philadelphia located and what are its coordinates?
Philadelphia is situated in United States at geographic coordinates 39.9524, -75.1636 with an elevation of 12 meters above sea level.
02 · Q&AWhat is the population and time zone of Philadelphia?
Philadelphia has a recorded population of approximately 1,573,916 and observes the America/New_York time zone (USD).
03 · Q&AWhat languages and currency are used in Philadelphia?
Official and commonly spoken languages in Philadelphia include en-US, es-US, haw, fr, and the circulating currency is USD.
04 · Q&AHow can I check live conditions and daily updates for Philadelphia?
Today's Atlas provides continuous tracking for Philadelphia, featuring real-time weather conditions, daylight cycles, local geographic signals, and verified daily briefs.