Currently: 75 °F. Passing clouds. (Weather station: Ontario International Airport, USA). See more current weatherPast Weather in Fontana — Graph
°F
Time
Wind
(mph)
(mph)
Temp
(°F)
(°F)
61
65
69
73
77
81
85
89
93
97
101
Wed, Aug 6
Lo:70
12 am
Hi:70
0
Lo:70
6 am
Hi:91
2
Lo:95
12 pm
Hi:99
11
Lo:75
6 pm
Hi:91
9
Thu, Aug 7
Lo:70
12 am
Hi:75
1
Lo:72
6 am
Hi:97
2
Lo:97
12 pm
Hi:102
11
Lo:79
6 pm
Hi:93
7
Fri, Aug 8
Lo:73
12 am
Hi:77
1
Lo:72
6 am
Hi:93
2
Lo:93
12 pm
Hi:100
12
Lo:72
6 pm
Hi:90
7
Sat, Aug 9
Lo:66
12 am
Hi:70
3
Lo:66
6 am
Hi:88
4
Lo:90
12 pm
Hi:95
13
Lo:73
6 pm
Hi:86
7
Sun, Aug 10
Lo:66
12 am
Hi:72
4
Lo:66
6 am
Hi:86
6
Lo:88
12 pm
Hi:93
12
Lo:73
6 pm
Hi:84
8
Mon, Aug 11
Lo:70
12 am
Hi:73
1
Lo:70
6 am
Hi:90
1
Lo:88
12 pm
Hi:93
12
Lo:72
6 pm
Hi:84
9
Tue, Aug 12
Lo:66
12 am
Hi:70
4
Lo:64
6 am
Hi:84
2
Lo:86
12 pm
Hi:91
12
Lo:68
6 pm
Hi:82
9
Wed, Aug 13
Lo:64
12 am
Hi:66
5
Lo:64
6 am
Hi:82
3
Lo:86
12 pm
Hi:90
11
Lo:66
6 pm
Hi:81
8
Thu, Aug 14
Lo:66
12 am
Hi:66
4
Lo:66
6 am
Hi:79
3
Lo:82
12 pm
Hi:90
11
Lo:66
6 pm
Hi:79
9
Fri, Aug 15
Lo:64
12 am
Hi:66
3
Lo:66
6 am
Hi:77
4
Lo:79
12 pm
Hi:86
11
Lo:64
6 pm
Hi:75
9
Sat, Aug 16
Lo:63
12 am
Hi:64
4
Lo:64
6 am
Hi:73
4
Lo:77
12 pm
Hi:84
11
Lo:66
6 pm
Hi:77
9
Sun, Aug 17
Lo:63
12 am
Hi:64
4
Lo:64
6 am
Hi:81
2
Lo:82
12 pm
Hi:90
11
Lo:70
6 pm
Hi:81
8
Mon, Aug 18
Lo:64
12 am
Hi:70
3
Lo:63
6 am
Hi:84
2
Lo:90
12 pm
Hi:93
12
Lo:73
6 pm
Hi:84
9
Tue, Aug 19
Lo:66
12 am
Hi:72
2
Lo:68
6 am
Hi:88
3
Lo:90
12 pm
Hi:93
11
Lo:75
6 pm
Hi:86
9
Wed, Aug 20
Lo:70
12 am
Hi:72
1
Lo:70
6 am
Hi:91
1
Lo:93
12 pm
Hi:99
11
Lo:79
6 pm
Hi:90
7
Thu, Aug 21
Lo:75
12 am
Hi:77
0
Wednesday, August 6, 2025, 12:00 am — 6:00 am
70 / 70 °F
Clear.
Humidity: 72%
Barometer: 29.96 "Hg
N
Wind: 0 mph
Fontana Temperature Yesterday
Maximum temperature yesterday: 99 °F (at 2:53 pm)
Minimum temperature yesterday: 69 °F (at 5:53 am)
Average temperature yesterday: 83 °F
High & Low Weather Summary for the Past Weeks
| Temperature | Humidity | Pressure | |
|---|---|---|---|
| High | 103 °F (Aug 7, 2:53 pm) | 93% (Aug 18, 6:53 am) | 30.05 "Hg (Aug 18, 6:53 am) |
| Low | 62 °F (Aug 18, 6:53 am) | 10% (Aug 7, 12:53 pm) | 29.79 "Hg (Aug 9, 5:53 pm) |
| Average | 77 °F | 55% | 29.89 "Hg |
| * Reported Aug 6 3:53 am — Aug 21 3:53 am, Fontana. Weather by CustomWeather, © 2025 | |||
Note: Actual official high and low records may vary slightly from our data, if they occured in-between our weather recording intervals... More about our weather records
Fontana Weather History for the Previous 24 Hours
Scroll right to see more
| Conditions | Comfort | |||||||
|---|---|---|---|---|---|---|---|---|
| Time | Temp | Weather | Wind | Humidity | Barometer | Visibility | ||
| 3:53 am Thu, Aug 21 | | 76 °F | Passing clouds. | No wind | ↑ | 45% | 29.82 "Hg | 10 mi |
| 2:53 am | | 76 °F | Passing clouds. | No wind | ↑ | 47% | 29.83 "Hg | 10 mi |
| 1:53 am | | 77 °F | Passing clouds. | No wind | ↑ | 44% | 29.83 "Hg | 10 mi |
| 12:53 am | | 77 °F | Passing clouds. | No wind | ↑ | 44% | 29.83 "Hg | 10 mi |
| 11:53 pm Wed, Aug 20 | | 79 °F | Passing clouds. | No wind | ↑ | 41% | 29.85 "Hg | 10 mi |
| 10:53 pm | | 80 °F | Passing clouds. | No wind | ↑ | 38% | 29.85 "Hg | 10 mi |
| 9:53 pm | | 81 °F | Passing clouds. | 9 mph | ↑ | 37% | 29.86 "Hg | 10 mi |
| 8:53 pm | | 84 °F | Passing clouds. | 9 mph | ↑ | 32% | 29.85 "Hg | 10 mi |
| 7:53 pm | | 86 °F | Passing clouds. | 12 mph | ↑ | 27% | 29.83 "Hg | 10 mi |
| 6:53 pm |  | 90 °F | Partly sunny. | 13 mph | ↑ | 26% | 29.81 "Hg | 10 mi |
| 5:53 pm | | 94 °F | Partly sunny. | 12 mph | ↑ | 21% | 29.80 "Hg | 10 mi |
| 4:53 pm | | 97 °F | Partly sunny. | 13 mph | ↑ | 21% | 29.80 "Hg | 10 mi |
| 3:53 pm | | 99 °F | Partly sunny. | 12 mph | ↑ | 18% | 29.80 "Hg | 10 mi |
| 2:53 pm |  | 99 °F | Scattered clouds. | 13 mph | ↑ | 18% | 29.82 "Hg | 10 mi |
| 1:53 pm | | 97 °F | Scattered clouds. | 7 mph | ↑ | 19% | 29.85 "Hg | 10 mi |
| 12:53 pm | | 96 °F | Scattered clouds. | 7 mph | ↑ | 17% | 29.87 "Hg | 10 mi |
| 11:53 am | | 91 °F | Passing clouds. | 6 mph | ↑ | 22% | 29.89 "Hg | 10 mi |
| 10:53 am | | 86 °F | Passing clouds. | No wind | ↑ | 30% | 29.91 "Hg | 10 mi |
| 9:53 am | | 81 °F | Passing clouds. | No wind | ↑ | 39% | 29.93 "Hg | 10 mi |
| 8:53 am | | 77 °F | Passing clouds. | 3 mph | ↑ | 48% | 29.93 "Hg | 10 mi |
| 7:53 am | | 72 °F | Passing clouds. | No wind | ↑ | 61% | 29.93 "Hg | 10 mi |
| 6:53 am | | 70 °F | Passing clouds. | No wind | ↑ | 64% | 29.92 "Hg | 10 mi |
| 5:53 am | | 69 °F | Passing clouds. | No wind | ↑ | 63% | 29.91 "Hg | 10 mi |
| Weather by CustomWeather, © 2025 | ||||||||