Maple Grove Raceway
NHRA Pep Boys Nationals (through 2025)
30 Stauffer Park Lane, Mohnton, PA 19540
What’s nearby
Crosswind down the strip: 4 mph6 km/h with 4 mph6 km/h across
Layout © OpenStreetMap contributors · north up
- Track temp
- 51°F11°C
- Rain chance
- 0%
- Wind
- 5mph8km/hWNW
- Density alt.
- -338ft-103m
- Barometer 30.42 inHg1030 hPa steady
- Humidity 49%
- Cloud 7%
- UV 0
Forecast updated · Open-Meteo
Hour by hour
ClearTemperature 51°11°Rain chance 0%Wind 5 mph8 km/hWNWTrack temperature 51°11°ClearTemperature 50°10°Rain chance 0%Wind 5 mph9 km/hNWTrack temperature 50°10°ClearTemperature 49°10°Rain chance 0%Wind 5 mph9 km/hNWTrack temperature 49°10°Mostly clearTemperature 49°9°Rain chance 0%Wind 3 mph5 km/hNWTrack temperature 49°9°
Partly cloudyTemperature 48°9°Rain chance 0%Wind 4 mph6 km/hNTrack temperature 48°9°Mostly clearTemperature 47°9°Rain chance 0%Wind 3 mph5 km/hNTrack temperature 47°9°Partly cloudyTemperature 46°8°Rain chance 0%Wind 4 mph6 km/hNNETrack temperature 46°8°
OvercastTemperature 45°7°Rain chance 0%Wind 4 mph6 km/hNETrack temperature 45°7°OvercastTemperature 45°7°Rain chance 0%Wind 3 mph5 km/hNETrack temperature 45°7°OvercastTemperature 44°7°Rain chance 0%Wind 4 mph6 km/hENETrack temperature 44°7°OvercastTemperature 44°7°Rain chance 0%Wind 4 mph6 km/hENETrack temperature 44°7°OvercastTemperature 43°6°Rain chance 0%Wind 3 mph5 km/hETrack temperature 43°6°OvercastTemperature 43°6°Rain chance 0%Wind 4 mph6 km/hETrack temperature 43°6°
OvercastTemperature 44°6°Rain chance 0%Wind 4 mph6 km/hETrack temperature 44°7°OvercastTemperature 46°8°Rain chance 0%Wind 4 mph7 km/hETrack temperature 50°10°OvercastTemperature 50°10°Rain chance 0%Wind 3 mph5 km/hENETrack temperature 63°17°OvercastTemperature 53°12°Rain chance 1%Wind 3 mph5 km/hENETrack temperature 70°21°OvercastTemperature 55°13°Rain chance 1%Wind 2 mph3 km/hNETrack temperature 75°24°OvercastTemperature 57°14°Rain chance 1%Wind 1 mph2 km/hNTrack temperature 84°29°OvercastTemperature 59°15°Rain chance 1%Wind 1 mph2 km/hWSWTrack temperature 84°29°OvercastTemperature 60°16°Rain chance 1%Wind 3 mph4 km/hWSWTrack temperature 81°27°OvercastTemperature 60°15°Rain chance 1%Wind 3 mph6 km/hWSWTrack temperature 74°23°OvercastTemperature 59°15°Rain chance 1%Wind 3 mph6 km/hWSWTrack temperature 66°19°OvercastTemperature 54°12°Rain chance 1%Wind 4 mph7 km/hWSWTrack temperature 54°12°Hours in your time zone (the track's when they match). Track temperature is an estimate.
The racer numbers
Computed from the forecast air temperature, dew point and station pressure (NWS formulas). Track temperature is estimated from sun, wind and the surface; it is not a sensor reading. How these are figured.
Day by day
- TodayOct 3159°15° 42°5° 0%Green flag
- TomorrowNov 160°16° 43°6° 1%Green flag
- MonNov 263°17° 47°8° 2%Green flag
- TueNov 365°18° 47°9° 0%Green flag
- WedNov 468°20° 51°10° 4%Yellow flag
- ThuNov 5
69°21° 54°12° 45%Green flag - FriNov 668°20° 61°16° 46%Green flagpartial
| Day | Flag | Sky | High / low | Rain | Gusts | Track temp | Density alt. | Sunrise · sunset |
|---|---|---|---|---|---|---|---|---|
| Today Oct 31 | Green flag | Overcast | 59°15° 42°5° | 0% | 17 mph27 km/h NW | 78°26° | 156 ft48 m | 7:31 AM · 6:03 PM |
| Tomorrow Nov 1 | Green flag | Overcast | 60°16° 43°6° | 1% | 11 mph17 km/h SSE | 84°29° | 132 ft40 m | 6:32 AM · 5:02 PM |
| Mon Nov 2 | Green flag | Overcast | 63°17° 47°8° | 2% | 16 mph26 km/h SSW | 81°27° | 506 ft154 m | 6:33 AM · 5:01 PM |
| Tue Nov 3 | Green flag | Overcast | 65°18° 47°9° | 0% | 14 mph22 km/h SSW | 80°27° | 775 ft236 m | 6:34 AM · 5:00 PM |
| Wed Nov 4 | Yellow flaggusty wind | Overcast | 68°20° 51°10° | 4% | 25 mph40 km/h S | 84°29° | 1,205 ft367 m | 6:35 AM · 4:59 PM |
| Thu Nov 5 | Green flag | Light drizzle | 69°21° 54°12° | 45% 0.07 in1.9 mm | 22 mph36 km/h SSE | 82°28° | 1,498 ft457 m | 6:36 AM · 4:58 PM |
| Fri Nov 6 | Green flag | Drizzle | 68°20° 61°16° | 46% 0.3 in7.5 mm | 19 mph31 km/h SSE | 78°25° | 1,579 ft481 m | 6:38 AM · 4:57 PM |
Flags judge the racing hours, 9 am to 10 pm at the track. Days marked partial are at the edge of the forecast.
Every hour, every number
Today’s remaining 5 hours are free. Pro members get all seven days and the CSV.
| Hour | Air | Dew pt | Humidity | Barometer | Density alt. | Air density kg/m³ | Grains | Track temp (est.) | Wind | Rain |
|---|---|---|---|---|---|---|---|---|---|---|
| 51°11° | 33°0° | 49% | 30.42 inHg1030 hPa | -338 ft-103 m | 1.237 | 27 | 51°11° | 5 mph8 km/h WNW | 0% | |
| 50°10° | 31°-1° | 47% | 30.45 inHg1031 hPa | -460 ft-140 m | 1.242 | 25 | 50°10° | 5 mph9 km/h NW | 0% | |
| 49°10° | 30°-1° | 47% | 30.47 inHg1032 hPa | -534 ft-163 m | 1.244 | 24 | 49°10° | 5 mph9 km/h NW | 0% | |
| 49°9° | 30°-1° | 47% | 30.47 inHg1032 hPa | -562 ft-171 m | 1.245 | 24 | 49°9° | 3 mph5 km/h NW | 0% | |
| 48°9° | 30°-1° | 49% | 30.49 inHg1033 hPa | -631 ft-192 m | 1.248 | 24 | 48°9° | 4 mph6 km/h N | 0% |
Every hour from the forecast, the same arithmetic as the pit box above (NWS density-altitude formula; track temperature is an estimate). Hours in your time zone, the track’s when they match.
Plan the whole week at Maple Grove
Pit box, all week
Every forecast hour for the next seven days at Maple Grove: density altitude, air density, grains, track temp and more, with a CSV for the tuning laptop.
Do the models agree?
ECMWF, GFS and ICON side by side for the next three racing days, so you know when the forecast is shaky.
Next 6 hours of rain
Rain in 15-minute steps for the next six hours at your tracks, refreshed every hour.
Alerts for your tracks
An email the morning a red or yellow flag is due at Maple Grove, and a heads-up three days out.
Getting to Maple Grove
30 Stauffer Park Lane, Mohnton, PA 19540
We have not checked parking and camping here yet. The track’s own site has them: official site.
Facts
- Location
- Mohnton, Pennsylvania
- Layout
- Quarter-mile drag strip
- Length
- Quarter mile (1,320 ft)
- Surface
- Asphalt/concrete
- Opened
- 1962
- Series
- NHRA
- Signature events
- NHRA Pep Boys Nationals (through 2025)
- Time zone
- America/New York
- Elevation
- 525 ft (160 m)