June brings 26°C daytime highs, 92mm of precipitation across about 10 wet days and 14.8 hours of daylight — best for beach days, swimming and reliable sunshine. The strongest run of the year is April to June. January is the quietest month: quiet and local, and still good for cabin weekends, low-angle light and quiet and local.
Long-run climate normals for Philadelphia. Month ratings compare months within Philadelphia only — they are not a ranking of Philadelphia against other destinations, and they are not a forecast for a specific year.
Last updated: · Live forecast data refreshes hourly.
| Best month | June — Beach days, Swimming, Reliable sunshine |
| Best 3-month window | April–June |
| Quietest month | January — Quiet and local |
| Driest month | February — 67mm |
| Wettest month | July — 101mm |
| Warmest / coolest | July 30°C / February 4°C |
| Seasonality | Strongly seasonal — the months feel like different places |
| Annual rainfall | 1076mm over roughly 117 rain days |
Philadelphia swings 26°C between July (30°C) and February (4°C) — the month you pick changes what you pack more than where you go.
June gives you 14.8 hours of daylight against just 9.2 in December — a 6-hour difference in how much you can actually fit into a day.
February is the driest month at 67mm across roughly 8 wet days, while July peaks at 101mm.
May is almost as good as June, but usually quieter and cheaper. If your dates are flexible, it is the easier trip.
Philadelphia changes character completely through the year — June and January are effectively two different destinations. Pick the month that matches what you want to do, not the highest-rated one.
Ratings compare months within Philadelphia, not against destinations worldwide: five stars means the best time to be here, not that Philadelphia beats anywhere else. Tags describe what the conditions actually suit.
| Month | Rating | High / Low | Precipitation | Wet days | Sun | Daylight | Best for |
|---|---|---|---|---|---|---|---|
| January | ★★☆☆☆ | 4°C / -3°C | 79mm (rain/snow) | 9 | 5h | 9.5h | Cabin weekends · Low-angle light · Quiet and local |
| February | ★★☆☆☆ | 4°C / -3°C | 67mm (rain/snow) | 8 | 5h | 10.5h | Cabin weekends · Low-angle light · Quiet and local |
| March | ★★☆☆☆ | 8°C / 0°C | 95mm (rain/snow) | 11 | 5h | 11.8h | Quiet and local |
| April | ★★★★☆ | 14°C / 6°C | 89mm | 10 | 6h | 13.1h | Hiking · Cycling · Spring greenery |
| May | ★★★★★ | 20°C / 11°C | 84mm | 10 | 10h | 14.3h | Hiking · Cycling · Reliable sunshine |
| June | ★★★★★ | 26°C / 17°C | 92mm | 10 | 11h | 14.8h | Beach days · Swimming · Reliable sunshine |
| July | ★★★★☆ | 30°C / 20°C | 101mm | 11 | 5h | 14.5h | Beach days · Swimming |
| August | ★★★☆☆ | 30°C / 20°C | 96mm | 11 | 5h | 13.5h | Beach days · Swimming |
| September | ★★★★☆ | 26°C / 17°C | 93mm | 11 | 5h | 12.2h | Beach days · Swimming |
| October | ★★★★★ | 20°C / 11°C | 76mm | 9 | 10h | 10.9h | Hiking · Cycling · Reliable sunshine |
| November | ★★★★☆ | 14°C / 6°C | 74mm | 8 | 9h | 9.7h | Hiking · Cycling · Reliable sunshine |
| December | ★★☆☆☆ | 8°C / 0°C | 82mm (rain/snow) | 9 | 5h | 9.2h | Festive season · Low-angle light · Quiet and local |
| You are planning | Pick | Why |
|---|---|---|
| Sun & beach days | June | 11h daily sunshine, 26°C highs and only 10 rain days. |
| City walking & sightseeing | October | 20°C highs with 10.9h of daylight — long days without heat fatigue. |
| Photography & light | June | 11h of sun and 14.8h daylight give the widest window for golden-hour work. |
| Value & fewer crowds | November | Scores 64/100 — close to peak conditions but outside the busiest window. |
| Cooler-weather travel | November | 14°C highs and 6°C nights suit anyone who dislikes heat. |
Each month in Philadelphia is described from long-run climate normals and then rated relative to the other eleven months in the same city. A five-star January in a cold destination means January is one of the best times to be there — not that it beats a Mediterranean summer.
| Factor | Weight | What it measures |
|---|---|---|
| Temperature | Described | Average daytime high and overnight low for the month, shown as measured rather than judged. |
| Precipitation | Described | Monthly millimetres and wet-day count, labelled as snow or rain/snow where temperatures make that the likely phase. |
| Sunshine & daylight | Described | Average daily sunshine hours and astronomical daylight length at mid-month, from the city’s latitude. |
| “Best for” tags | Derived | Applied only when the conditions genuinely support the activity — snow depth-friendly cold for skiing, 13–24°C and low rain risk for hiking, dark evenings at high latitude for aurora. A month with few strong use cases gets fewer tags rather than padded ones. |
| Star rating | Relative | Ranks the month against the other eleven months in the same city. Never a comparison between cities. |
Figures are long-run climate averages, not a forecast for a specific year. Where a month lacks sourced rainfall or humidity, the value is modelled from temperature range and rain frequency.
June is the best all-round month in Philadelphia: 26°C highs, 92mm of precipitation and 14.8 hours of daylight, which suits beach days, swimming and reliable sunshine. The strongest three-month window is April to June.
January — 4°C highs, 79mm of precipitation over roughly 9 days and 9.5 hours of daylight. It is the cheapest and least crowded time to go, and it still works for cabin weekends, low-angle light and quiet and local.
February is the driest month at 67mm over about 8 rain days, against 101mm in July. Across the year Philadelphia records around 1076mm.
Yes, but the months are genuinely different trips. June suits beach days, swimming and reliable sunshine, while January suits cabin weekends, low-angle light and quiet and local. Pick the month that matches what you want to do.
Daylight ranges from 9.2 hours in December to 14.8 hours in June, calculated from the city's latitude.