FindMyMarathon / Race-day weather
Philadelphia Marathon Weather Forecast 2026
Check the Philadelphia Marathon weather for your time on the course.
Choose your start time and goal finish time for temperature, rain chance and wind. Free to use.
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Your race forecast
Goal 2:00:00 Philadelphia local time
Start
7:00am- Wind
- 5.00 mph NE
- Gusts
- 10 mph
- Humidity
- 91%
- Dewpoint
- 47°F
- Rain chance
- 16%
Halfway
8:00am- Wind
- 5.00 mph E
- Gusts
- 9 mph
- Humidity
- 88%
- Dewpoint
- 46°F
- Rain chance
- 23%
Finish
9:00am- Wind
- 5.00 mph ESE
- Gusts
- 8 mph
- Humidity
- 83%
- Dewpoint
- 46°F
- Rain chance
- 23%
Checkpoint colorsStartHalfwayFinish
Expect a partly cloudy start in Philadelphia near 48°F, with temperatures staying fairly steady through the route. Partly cloudy conditions should hold for much of the day. The biggest wind challenge looks to be in the final run toward the finish, where headwind exposure may be the most noticeable. Overall, the temperature setup looks fairly manageable for steady pacing.
Temperature & rain during your race
Wind along the course
Start to Mile 5
Slightly challenging
- Tailwind
- 12%
- Headwind
- 28%
- Gusts
- 10 mph
Miles 6 - 10
Helpful
- Tailwind
- 51%
- Headwind
- 1%
- Gusts
- 10 mph
Miles 11 - 15
Slightly challenging
- Tailwind
- 23%
- Headwind
- 38%
- Gusts
- 9 mph
Miles 16 - 20
Helpful
- Tailwind
- 49%
- Headwind
- 1%
- Gusts
- 9 mph
Miles 21 to Finish
Challenging
- Tailwind
- 2%
- Headwind
- 61%
- Gusts
- 8 mph
What to expect
- The opening miles should feel fairly comfortable for marathon running, with a good chance to settle into pace early.
- Late-race conditions look relatively manageable, which should reward runners who stay patient through Halfway and the second half.
- Wind impact looks mixed rather than strongly favorable or strongly challenging across the full route.
What to wear & carry
Based on the start temperature, wind and rain risk.
- Race kit should be enough at the start
- Normal fluid plan likely fine
- No major rain gear needed
- Minimal extra gear needed
2026 vs. typical Philadelphia
Historical race-day comparison
| Conditions | 2026 forecast | Typical | Difference |
|---|---|---|---|
| Race average temp | 50°F | 45°F | +5° |
| Start temperature | 48°F | 42°F | +6° |
| Start humidity | 91% | 72% | +19% |
| Start wind speed | 5 mph | 9 mph | -4 mph |
| Start wind direction | NE | W | — |
| Start conditions | Partly Cloudy | Sunny | More cloud cover |