NowOvercastTemperature 71°22°Rain chance 4%Wind 8 mph13 km/hETrack temperature 74°24°
OvercastTemperature 70°21°Rain chance 5%Wind 7 mph12 km/hESETrack temperature 72°22°
OvercastTemperature 67°20°Rain chance 5%Wind 5 mph7 km/hETrack temperature 67°20°
OvercastTemperature 66°19°Rain chance 9%Wind 5 mph8 km/hESETrack temperature 66°19°
OvercastTemperature 64°18°Rain chance 8%Wind 3 mph5 km/hENETrack temperature 64°18°
OvercastTemperature 63°17°Rain chance 8%Wind 3 mph5 km/hENETrack temperature 63°17°
OvercastTemperature 62°17°Rain chance 10%Wind 3 mph5 km/hNWTrack temperature 62°17°
DrizzleTemperature 62°16°Rain chance 16%Wind 2 mph3 km/hETrack temperature 62°16°
Light rainTemperature 61°16°Rain chance 29%Wind 9 mph15 km/hESETrack temperature 61°16°
OvercastTemperature 61°16°Rain chance 33%Wind 3 mph5 km/hETrack temperature 61°16°
Light drizzleTemperature 61°16°Rain chance 40%Wind 3 mph5 km/hSETrack temperature 61°16°
OvercastTemperature 61°16°Rain chance 39%Wind 5 mph7 km/hSETrack temperature 61°16°
OvercastTemperature 61°16°Rain chance 44%Wind 8 mph13 km/hSSETrack temperature 61°16°
DrizzleTemperature 60°16°Rain chance 35%Wind 11 mph18 km/hSETrack temperature 60°16°
OvercastTemperature 60°16°Rain chance 32%Wind 6 mph10 km/hSSETrack temperature 60°16°
OvercastTemperature 61°16°Rain chance 29%Wind 5 mph8 km/hSETrack temperature 61°16°
OvercastTemperature 61°16°Rain chance 29%Wind 5 mph9 km/hSETrack temperature 61°16°
OvercastTemperature 61°16°Rain chance 26%Wind 6 mph10 km/hESETrack temperature 62°17°
OvercastTemperature 61°16°Rain chance 17%Wind 10 mph16 km/hSETrack temperature 63°17°
Light drizzleTemperature 60°16°Rain chance 13%Wind 10 mph17 km/hSETrack temperature 61°16°
OvercastTemperature 60°15°Rain chance 12%Wind 10 mph16 km/hSSETrack temperature 60°16°
OvercastTemperature 60°16°Rain chance 12%Wind 9 mph14 km/hSETrack temperature 62°17°
OvercastTemperature 60°16°Rain chance 7%Wind 9 mph15 km/hSETrack temperature 63°17°
OvercastTemperature 60°15°Rain chance 5%Wind 8 mph13 km/hSETrack temperature 62°16°
Hours in your time zone (the track's when they match). Track temperature is an estimate.
Pit box
The racer numbers
Density altitude1,116ft340mField elevation 417 ft
Air density1.185kg/m³96.8% of standard (RAD)
Water grains45grgrains per lb of dry air
Track temp (est.)74°F24°CDirt in 92 W/m² sun
Dew point45°F7°C39% humidity
Barometer30.20inHg1023hPaFalling over 3 h
SurfaceDryDry, likely dusty: little rain in 48 h
Rain, last 48 h0.0in0mmat 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 3173°23°57°14° 16%Green flag
TomorrowNov 161°16°59°15° 44%Green flag
MonNov 269°21°58°15° 5%Yellow flag
TueNov 371°21°64°18° 68%Yellow flag
WedNov 472°22°59°15° 42%Green flag
ThuNov 569°21°54°12° 15%Green flag
FriNov 660°16°54°12° 9%Green flagpartial
Day
Flag
Sky
High / low
Rain
Gusts
Track temp
Density alt.
Sunrise · sunset
Today Oct 31
Green flag
Overcast
73°23°57°14°
16% 0.03 in0.7 mm
17 mph27 km/h ENE
86°30°
1,220 ft372 m
7:25 AM · 6:02 PM
Tomorrow Nov 1
Green flag
Light drizzle
61°16°59°15°
44% 0.15 in3.7 mm
28 mph45 km/h SE
63°17°
451 ft137 m
6:26 AM · 5:01 PM
Mon Nov 2
Yellow flaggusty wind
Overcast
69°21°58°15°
5%
38 mph62 km/h SSE
71°22°
1,344 ft410 m
6:27 AM · 5:00 PM
Tue Nov 3
Yellow flaggusty wind
Drizzle
71°21°64°18°
68% 0.13 in3.4 mm
41 mph67 km/h S
81°27°
1,588 ft484 m
6:28 AM · 4:59 PM
Wed Nov 4
Green flag
Overcast
72°22°59°15°
42% 0.06 in1.6 mm
12 mph19 km/h WNW
92°33°
1,485 ft453 m
6:29 AM · 4:58 PM
Thu Nov 5
Green flag
Partly cloudy
69°21°54°12°
15%
13 mph21 km/h N
89°32°
1,333 ft406 m
6:30 AM · 4:57 PM
Fri Nov 6
Green flag
Overcast
60°16°54°12°
9%
11 mph17 km/h NNW
66°19°
768 ft234 m
6:31 AM · 4:56 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
71°22°
45°7°
39%
30.20 inHg1023 hPa
1,116 ft340 m
1.185
45
74°24°
8 mph13 km/h E
4%
70°21°
46°8°
42%
30.22 inHg1023 hPa
1,011 ft308 m
1.189
46
72°22°
7 mph12 km/h ESE · gusts 17 mph27 km/h
5%
67°20°
47°8°
47%
30.26 inHg1025 hPa
815 ft248 m
1.196
47
67°20°
5 mph7 km/h E
5%
66°19°
48°9°
53%
30.27 inHg1025 hPa
703 ft214 m
1.200
50
66°19°
5 mph8 km/h ESE · gusts 12 mph19 km/h
9%
64°18°
51°11°
63%
30.28 inHg1025 hPa
612 ft187 m
1.203
56
64°18°
3 mph5 km/h ENE · gusts 12 mph19 km/h
8%
63°17°
55°13°
76%
30.26 inHg1025 hPa
560 ft171 m
1.205
65
63°17°
3 mph5 km/h ENE
8%
62°17°
56°13°
79%
30.27 inHg1025 hPa
528 ft161 m
1.206
66
62°17°
3 mph5 km/h NW
10%
62°16°
57°14°
86%
30.28 inHg1025 hPa
476 ft145 m
1.208
70
62°16°
2 mph3 km/h E
16%
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 Tri-City (IL)
Pit box, all week
Every forecast hour for the next seven days at Tri-City (IL): 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 Tri-City (IL), and a heads-up three days out.
OvercastTemperature 66°19°Rain chance 9%Wind 5 mph8 km/hESETrack temperature 66°19°
DrizzleTemperature 62°16°Rain chance 16%Wind 2 mph3 km/hETrack temperature 62°16°
Light rainTemperature 61°16°Rain chance 29%Wind 9 mph15 km/hESETrack temperature 61°16°
69°21° 54°12° 15%Green flag