- Track temp
- 74°F24°C
- Rain chance
- 9%
- Wind
- 3mph5km/hNNE
- Density alt.
- 1,178ft359m
- Barometer 29.85 inHg1011 hPa falling
- Humidity 58%
- Cloud 100%
- UV 1
Forecast updated · Open-Meteo
Hour by hour
OvercastTemperature 69°20°Rain chance 9%Wind 3 mph5 km/hNNETrack temperature 74°24°OvercastTemperature 68°20°Rain chance 12%Wind 3 mph4 km/hNETrack temperature 70°21°
Heavy drizzleTemperature 64°18°Rain chance 16%Wind 2 mph3 km/hSSETrack temperature 64°18°
OvercastTemperature 63°17°Rain chance 24%Wind 4 mph6 km/hNTrack temperature 63°17°OvercastTemperature 62°17°Rain chance 24%Wind 3 mph5 km/hNNETrack temperature 62°17°OvercastTemperature 62°17°Rain chance 40%Wind 2 mph4 km/hNNWTrack temperature 62°17°
Light rainTemperature 61°16°Rain chance 54%Wind 5 mph8 km/hWNWTrack temperature 61°16°Light rainTemperature 60°16°Rain chance 58%Wind 0 mph1 km/hNNETrack temperature 60°16°Light rainTemperature 60°16°Rain chance 63%Wind 3 mph5 km/hNNWTrack temperature 60°16°
RainTemperature 60°16°Rain chance 62%Wind 4 mph6 km/hNWTrack temperature 60°16°DrizzleTemperature 60°16°Rain chance 53%Wind 6 mph10 km/hWNWTrack temperature 60°16°OvercastTemperature 59°15°Rain chance 33%Wind 5 mph8 km/hWTrack temperature 59°15°OvercastTemperature 58°15°Rain chance 22%Wind 9 mph15 km/hWNWTrack temperature 58°15°OvercastTemperature 58°14°Rain chance 11%Wind 5 mph8 km/hNWTrack temperature 58°14°
ClearTemperature 56°13°Rain chance 13%Wind 7 mph11 km/hNWTrack temperature 56°13°ClearTemperature 55°13°Rain chance 9%Wind 6 mph10 km/hNWTrack temperature 55°13°
Mostly clearTemperature 54°12°Rain chance 1%Wind 4 mph7 km/hWNWTrack temperature 55°13°OvercastTemperature 57°14°Rain chance 1%Wind 7 mph11 km/hNWTrack temperature 61°16°OvercastTemperature 58°14°Rain chance 2%Wind 9 mph15 km/hWNWTrack temperature 60°16°
Light rainTemperature 55°13°Rain chance 13%Wind 11 mph18 km/hNWTrack temperature 56°14°OvercastTemperature 56°14°Rain chance 10%Wind 10 mph17 km/hNNWTrack temperature 67°20°
Partly cloudyTemperature 58°14°Rain chance 4%Wind 10 mph16 km/hNWTrack temperature 76°25°Mostly clearTemperature 60°15°Rain chance 2%Wind 8 mph13 km/hNNWTrack temperature 82°28°ClearTemperature 59°15°Rain chance 1%Wind 10 mph16 km/hNTrack temperature 78°26°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 3170°21° 56°13° 58%Red flag
- TomorrowNov 160°16° 49°10° 63%Red flag
- MonNov 267°19° 45°7° 0%Green flag
- TueNov 373°23° 56°14° 1%Green flag
- WedNov 465°18° 54°12° 0%Green flag
- ThuNov 564°18° 54°12° 1%Green flag
- FriNov 672°22° 54°12° 1%Green flagpartial
| Day | Flag | Sky | High / low | Rain | Gusts | Track temp | Density alt. | Sunrise · sunset |
|---|---|---|---|---|---|---|---|---|
| Today Oct 31 | Red flagrain | Heavy drizzle | 70°21° 56°13° | 58% 0.19 in4.7 mm | 9 mph14 km/h NNE | 93°34° | 1,243 ft379 m | 7:18 AM · 6:05 PM |
| Tomorrow Nov 1 | Red flagrain | Light rain | 60°16° 49°10° | 63% 0.28 in7.2 mm | 21 mph33 km/h NW | 82°28° | 515 ft157 m | 6:19 AM · 5:04 PM |
| Mon Nov 2 | Green flag | Overcast | 67°19° 45°7° | 0% | 7 mph12 km/h NNE | 94°34° | 722 ft220 m | 6:20 AM · 5:03 PM |
| Tue Nov 3 | Green flag | Overcast | 73°23° 56°14° | 1% | 22 mph35 km/h NW | 97°36° | 1,187 ft362 m | 6:21 AM · 5:02 PM |
| Wed Nov 4 | Green flag | Clear | 65°18° 54°12° | 0% | 11 mph18 km/h NW | 88°31° | 727 ft222 m | 6:22 AM · 5:01 PM |
| Thu Nov 5 | Green flag | Overcast | 64°18° 54°12° | 1% | 5 mph9 km/h NW | 73°23° | 718 ft219 m | 6:23 AM · 5:00 PM |
| Fri Nov 6 | Green flag | Clear | 72°22° 54°12° | 1% | 6 mph9 km/h NW | 99°37° | 1,177 ft359 m | 6:24 AM · 4:59 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 8 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 69°20° | 53°12° | 58% | 29.85 inHg1011 hPa | 1,178 ft359 m | 1.183 | 61 | 74°24° | 3 mph5 km/h NNE | 9% | |
| 68°20° | 53°12° | 59% | 29.87 inHg1012 hPa | 1,135 ft346 m | 1.185 | 61 | 70°21° | 3 mph4 km/h NE | 12% | |
| 64°18° | 57°14° | 78% | 29.87 inHg1012 hPa | 910 ft277 m | 1.193 | 71 | 64°18° | 2 mph3 km/h SSE | 16% | |
| 63°17° | 58°15° | 85% | 29.86 inHg1011 hPa | 850 ft259 m | 1.195 | 73 | 63°17° | 4 mph6 km/h N | 24% | |
| 62°17° | 58°15° | 87% | 29.87 inHg1012 hPa | 790 ft241 m | 1.197 | 73 | 62°17° | 3 mph5 km/h NNE | 24% | |
| 62°17° | 58°15° | 88% | 29.85 inHg1011 hPa | 790 ft241 m | 1.197 | 73 | 62°17° | 2 mph4 km/h NNW | 40% | |
| 61°16° | 59°15° | 93% | 29.83 inHg1010 hPa | 744 ft227 m | 1.198 | 75 | 61°16° | 5 mph8 km/h WNW | 54% | |
| 60°16° | 59°15° | 96% | 29.83 inHg1010 hPa | 702 ft214 m | 1.200 | 75 | 60°16° | 0 mph1 km/h NNE | 58% |
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 Buttonwillow
Pit box, all week
Every forecast hour for the next seven days at Buttonwillow: 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 Buttonwillow, and a heads-up three days out.
A year at Buttonwillow
Typical for October here: highs around 83°29°, lows 56°13°, rain on 4% of days.
5-year averages from the Open-Meteo archive at the track's coordinates.
Getting to Buttonwillow
24551 W Lerdo Hwy, Buttonwillow, CA 93206
Camping On site
70-space RV park on site with power and water, showers at each track. Per day: Classic Track $60 premium, $50 standard; Circuit Track $50 and $40. Reserve early and say 30 or 50 amp: (661) 764-5333. buttonwillowraceway.com
From the track’s own pages, checked October 2026. Prices and rules change by event, so confirm before you go.
Facts
- Location
- Buttonwillow, California
- Layout
- 3.1-mile configurable road course
- Length
- 3.1 mi (4.99 km)
- Surface
- Asphalt
- Opened
- 1995
- Series
- Club racing
- Signature events
- Global Time Attack
- Time zone
- America/Los Angeles
- Elevation
- 249 ft (76 m)