NowHeavy drizzleTemperature 62°17°Rain chance 60%Wind 6 mph10 km/hESETrack temperature 63°17°
OvercastTemperature 62°17°Rain chance 63%Wind 7 mph12 km/hESETrack temperature 65°18°
OvercastTemperature 61°16°Rain chance 45%Wind 8 mph12 km/hSETrack temperature 62°16°
OvercastTemperature 61°16°Rain chance 37%Wind 9 mph14 km/hSETrack temperature 61°16°
OvercastTemperature 60°16°Rain chance 18%Wind 9 mph15 km/hESETrack temperature 60°16°
OvercastTemperature 60°16°Rain chance 14%Wind 8 mph14 km/hSETrack temperature 60°16°
OvercastTemperature 60°16°Rain chance 9%Wind 7 mph11 km/hSETrack temperature 60°16°
OvercastTemperature 60°16°Rain chance 14%Wind 6 mph9 km/hESETrack temperature 60°16°
OvercastTemperature 60°16°Rain chance 12%Wind 6 mph9 km/hETrack temperature 60°16°
OvercastTemperature 60°16°Rain chance 10%Wind 5 mph9 km/hESETrack temperature 60°16°
OvercastTemperature 59°15°Rain chance 9%Wind 7 mph11 km/hESETrack temperature 59°15°
OvercastTemperature 59°15°Rain chance 5%Wind 7 mph11 km/hSETrack temperature 59°15°
OvercastTemperature 59°15°Rain chance 6%Wind 5 mph8 km/hESETrack temperature 59°15°
OvercastTemperature 59°15°Rain chance 4%Wind 6 mph10 km/hETrack temperature 59°15°
OvercastTemperature 60°15°Rain chance 5%Wind 5 mph8 km/hSETrack temperature 60°15°
OvercastTemperature 61°16°Rain chance 2%Wind 4 mph6 km/hETrack temperature 61°16°
OvercastTemperature 61°16°Rain chance 2%Wind 4 mph6 km/hETrack temperature 61°16°
OvercastTemperature 62°17°Rain chance 2%Wind 4 mph6 km/hESETrack temperature 64°18°
OvercastTemperature 62°17°Rain chance 2%Wind 4 mph7 km/hSETrack temperature 65°18°
OvercastTemperature 63°17°Rain chance 2%Wind 3 mph4 km/hESETrack temperature 68°20°
OvercastTemperature 65°18°Rain chance 1%Wind 4 mph7 km/hETrack temperature 79°26°
OvercastTemperature 66°19°Rain chance 1%Wind 5 mph8 km/hSETrack temperature 74°23°
OvercastTemperature 66°19°Rain chance 1%Wind 5 mph8 km/hSETrack temperature 73°23°
OvercastTemperature 66°19°Rain chance 1%Wind 5 mph7 km/hSSETrack temperature 79°26°
Hours in your time zone (the track's when they match). Track temperature is an estimate.
Pit box
The racer numbers
Density altitude1,339ft408mField elevation 968 ft
Air density1.178kg/m³96.1% of standard (RAD)
Water grains78grgrains per lb of dry air
Track temp (est.)63°F17°CDirt in 36 W/m² sun
Dew point60°F15°C92% humidity
Barometer30.15inHg1021hPaFalling over 3 h
SurfaceWetWet: heavy rain or saturated ground
Rain, last 48 h1.46in37.1mmat the track
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.
This week
Day by day
TodayOct 3164°18°60°16° 63%Red flag
TomorrowNov 167°20°59°15° 12%Green flag
MonNov 277°25°61°16° 94%Red flag
TueNov 370°21°51°11° 94%Green flag
WedNov 470°21°48°9° 8%Green flag
ThuNov 567°19°49°9° 9%Green flag
FriNov 660°16°47°9° 5%Green flagpartial
Day
Flag
Sky
High / low
Rain
Gusts
Track temp
Density alt.
Sunrise · sunset
Today Oct 31
Red flagrain
Heavy drizzle
64°18°60°16°
63% 0.04 in1.1 mm
20 mph32 km/h E
76°25°
1,456 ft444 m
7:44 AM · 6:25 PM
Tomorrow Nov 1
Green flag
Overcast
67°20°59°15°
12%
15 mph24 km/h SE
79°26°
1,694 ft516 m
6:46 AM · 5:24 PM
Mon Nov 2
Red flaglightning possible, gusty wind
Thunderstorm
77°25°61°16°
94% 0.34 in8.7 mm
44 mph71 km/h S
86°30°
2,870 ft875 m
6:47 AM · 5:23 PM
Tue Nov 3
Green flag
Overcast
70°21°51°11°
94% 0.05 in1.3 mm
35 mph56 km/h WNW
80°27°
1,698 ft518 m
6:48 AM · 5:22 PM
Wed Nov 4
Green flag
Clear
70°21°48°9°
8%
6 mph9 km/h SSW
91°33°
2,025 ft617 m
6:49 AM · 5:21 PM
Thu Nov 5
Green flag
Overcast
67°19°49°9°
9%
23 mph37 km/h ENE
83°28°
1,822 ft555 m
6:50 AM · 5:20 PM
Fri Nov 6
Green flag
Overcast
60°16°47°9°
5%
21 mph34 km/h N
72°22°
1,371 ft418 m
6:51 AM · 5:19 PM
Flags judge the racing hours, 9 am to 10 pm at the track. Days marked partial are at the edge of the forecast.
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
62°17°
60°15°
92%
30.15 inHg1021 hPa
1,339 ft408 m
1.178
78
63°17°
6 mph10 km/h ESE
60%
62°17°
60°15°
92%
30.17 inHg1022 hPa
1,315 ft401 m
1.179
78
65°18°
7 mph12 km/h ESE
63%
61°16°
59°15°
92%
30.16 inHg1022 hPa
1,273 ft388 m
1.180
76
62°16°
8 mph12 km/h SE · gusts 15 mph24 km/h
45%
61°16°
59°15°
94%
30.19 inHg1022 hPa
1,227 ft374 m
1.182
77
61°16°
9 mph14 km/h SE · gusts 17 mph27 km/h
37%
60°16°
58°15°
93%
30.17 inHg1022 hPa
1,200 ft366 m
1.183
75
60°16°
9 mph15 km/h ESE · gusts 17 mph28 km/h
18%
60°16°
58°15°
94%
30.18 inHg1022 hPa
1,169 ft356 m
1.184
75
60°16°
8 mph14 km/h SE · gusts 20 mph32 km/h
14%
60°16°
58°14°
93%
30.18 inHg1022 hPa
1,170 ft357 m
1.184
74
60°16°
7 mph11 km/h SE · gusts 20 mph32 km/h
9%
60°16°
59°15°
96%
30.18 inHg1022 hPa
1,174 ft358 m
1.183
76
60°16°
6 mph9 km/h ESE · gusts 15 mph24 km/h
14%
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.
Raceway Weather Pro
Plan the whole week at Humboldt
Pit box, all week
Every forecast hour for the next seven days at Humboldt: 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 Humboldt, and a heads-up three days out.
OvercastTemperature 62°17°Rain chance 63%Wind 7 mph12 km/hESETrack temperature 65°18°
OvercastTemperature 61°16°Rain chance 37%Wind 9 mph14 km/hSETrack temperature 61°16°
77°25° 61°16° 94%Red flag
70°21° 48°9° 8%Green flag