Six Flags Great America Weather
Gurnee, IL
· Six Flags · Theme park
Updated 18 minutes ago
Guest outlook (next 24h):
😊 Comfort: Excellent (98)
😤 Frustration: Low (0)
Current conditions
67°
Clear
Feels like
67°F
67°F
Dew point
62°F
62°F
Humidity
85%
85%
Cloud cover
2%
2%
Precip chance
0%
0%
Snow chance (24h)
0%
0%
Precip (next 24h)
0 in
0 in
Pressure
30.14 inHg
30.14 inHg
Wind
↑ NNE 5 mph · G10
↑ NNE 5 mph · G10
Attraction impact outlook
😴 Outside operating hours — see the next window
😊 Comfort: Excellent (98)
😤 Frustration: Low (0)
| Tall coasters (200ft+) (1) | Likely operating |
| Coasters (12) | Likely operating |
| Water rides (2) | Likely operating |
| Flat & spinning rides (9) | Likely operating |
| Kids' rides (5) | Likely operating |
😊 Comfort: Good (74)
😤 Frustration: Low (4)
| Tall coasters (200ft+) (1) | Likely operating |
| Coasters (12) | Likely operating |
| Water rides (2) | Likely operating |
| Flat & spinning rides (9) | Likely operating |
| Kids' rides (5) |
Possible impact
High of 89°F Mon 2pm approaching heat-advisory territory for guests
|
😊 Comfort: Good (62)
😤 Frustration: Moderate (16)
| Tall coasters (200ft+) (1) |
Possible impact
High of 93°F Tue 3pm approaching heat-advisory territory for guests
|
| Coasters (12) |
Possible impact
High of 93°F Tue 3pm approaching heat-advisory territory for guests
|
| Water rides (2) | Likely operating |
| Flat & spinning rides (9) |
Possible impact
High of 93°F Tue 3pm approaching heat-advisory territory for guests
|
| Kids' rides (5) |
Possible impact
Highs to 93°F Tue 3pm–6pm (≈3 hrs) — heat stress risk for guests; hydrate and plan indoor breaks
|
Forecast confidence decreases with range: the next-24h outlook is based on high-resolution NWS forecasts, while the 48–72h windows lean on model guidance and can shift meaningfully — recheck closer to your visit. Parks make their own operating decisions.
Forecast
Overnight
65°F
Clear
0 to 5 mph NNE
Sunday
84°F
Sunny
0 to 5 mph NE
Sunday Night
67°F
Mostly Clear
0 to 5 mph NNW
Monday
89°F
Sunny
0 to 5 mph W
Monday Night
72°F
Clear
0 to 5 mph WSW
Tuesday
93°F
Sunny
0 to 5 mph W
Tuesday Night
73°F
Clear
0 to 5 mph WSW
Wednesday
91°F
Sunny
5 mph NW · 2% precip
Wednesday Night
70°F
Mostly Clear
0 to 5 mph NNW · 2% precip
Overnight: Clear, with a low around 65. North northeast wind 0 to 5 mph.
72-hour forecast
Hour-by-hour (next 72 hours, park local time)
Sun Jul 12
1am
67°
0%
5/10
2am
66°
0%
0/10
3am
66°
0%
0/4
4am
65°
0%
0/4
5am
65°
0%
0/4
6am
65°
0%
0/5
7am
68°
0%
0/5
8am
73°
0%
0/5
9am
77°
0%
0/6
10am
80°
0%
0/6
11am
81°
0%
5/6
12pm
83°
0%
5/8
1pm
83°
0%
5/8
2pm
84°
0%
5/8
3pm
84°
0%
5/7
4pm
84°
0%
5/7
5pm
83°
0%
5/7
6pm
82°
0%
5/6
7pm
80°
0%
5/6
8pm
77°
0%
5/6
9pm
74°
0%
0/2
10pm
72°
0%
0/2
11pm
70°
0%
0/2
Mon Jul 13
12am
70°
0%
0/2
1am
69°
0%
0/2
2am
68°
0%
0/2
3am
67°
0%
0/3
4am
67°
0%
0/3
5am
67°
0%
0/3
6am
67°
0%
0/3
7am
70°
0%
0/3
8am
74°
0%
0/3
9am
78°
0%
5/5
10am
82°
0%
5/5
11am
85°
0%
5/5
12pm
87°
0%
5/5
1pm
88°
0%
5/5
2pm
89°
0%
5/5
3pm
89°
0%
5/5
4pm
89°
0%
5/5
5pm
88°
0%
5/5
6pm
88°
0%
5/6
7pm
87°
0%
5/6
8pm
85°
0%
5/6
9pm
81°
0%
0/4
10pm
79°
0%
0/4
11pm
77°
0%
0/4
Tue Jul 14
12am
76°
0%
0/6
1am
76°
0%
0/6
2am
75°
0%
0/6
3am
74°
0%
0/9
4am
73°
0%
0/9
5am
73°
0%
0/9
6am
74°
0%
0/10
7am
75°
0%
0/10
8am
78°
0%
0/10
9am
82°
0%
5/8
10am
86°
0%
5/8
11am
89°
0%
5/8
12pm
90°
0%
5/5
1pm
92°
0%
5/5
2pm
92°
0%
5/5
3pm
93°
0%
5/7
4pm
93°
0%
5/7
5pm
93°
0%
5/7
6pm
92°
0%
5/11
7pm
89°
0%
5/11
8pm
86°
0%
5/11
9pm
83°
0%
0/12
10pm
80°
0%
0/12
11pm
79°
0%
0/12
Wed Jul 15
12am
77°
0%
0/13
Rows: time · temperature · conditions (⚡ storms, 🌧 likely rain, 🌦 chance) · precip % · wind mph/gusts.
Hours beyond 48h are lower-confidence guidance.