Fairfax · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Fairfax & neighbors — hit play
Every city on the map carries real forecast data from the same models as its city page, refreshed several times a day. The icon is the day's overall look; the number is the afternoon high.
Next 14 days at a glance
from the model forecast
Hottest day
38°
Sun, Sep 13
Coldest night
17°
Sat, Sep 12
Days with precip
3 / 14
of 14 forecast days
Nicest day
Mon, Sep 7
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 5 – Sun 6 Sep
32° 19°
77% precip chance
Sat 12 – Sun 13 Sep
38° 17°
5% precip chance
Sat 19 – Sun 20 Sep
35° 21°
typical range
Sat 26 – Sun 27 Sep
34° 21°
typical range
30 days — Fairfax
14 forecast + 16 climatology
Thu · Today Sunny
37°24°6%⌄
Wind12 mph SW
Gusts24 mph
UV index7 – High
Precip chance6%
Sunrise06:35
Sunset19:37
Fri · Tomorrow Sunny
37°24°0.7 mm⌄
Wind31 mph NW
Gusts40 mph
UV index7 – High
Precip chance36%
Sunrise06:36
Sunset19:36
Saturday 5/9 Sunny
32°22°1.8 mm⌄
Wind11 mph E
Gusts21 mph
UV index7 – High
Precip chance57%
Sunrise06:37
Sunset19:34
Sunday 6/9 Mostly cloudy
27°19°4.2 mm⌄
Wind12 mph E
Gusts23 mph
UV index7 – High
Precip chance77%
Sunrise06:38
Sunset19:32
Monday 7/9 Sunny
28°18°7%⌄
Wind15 mph SE
Gusts30 mph
UV index7 – High
Precip chance7%
Sunrise06:39
Sunset19:31
Tuesday 8/9 Mostly cloudy
36°19°6%⌄
Wind18 mph S
Gusts30 mph
UV index9 – Very high
Precip chance6%
Sunrise06:40
Sunset19:29
Wednesday 9/9 Showers
30°23°1.3 mm⌄
Wind10 mph N
Gusts23 mph
UV index6 – High
Precip chance57%
Sunrise06:41
Sunset19:27
Thursday 10/9 Sunny
31°20°0.8 mm⌄
Wind12 mph E
Gusts28 mph
UV index8 – Very high
Precip chance39%
Sunrise06:42
Sunset19:26
Friday 11/9 Sunny
26°18°7%⌄
Wind23 mph SE
Gusts36 mph
UV index7 – High
Precip chance7%
Sunrise06:43
Sunset19:24
Saturday 12/9 Sunny
32°17°5%⌄
Wind16 mph SE
Gusts34 mph
UV index8 – Very high
Precip chance5%
Sunrise06:44
Sunset19:22
Sunday 13/9 Sunny
38°24°4%⌄
Wind13 mph SE
Gusts34 mph
UV index9 – Very high
Precip chance4%
Sunrise06:45
Sunset19:20
Monday 14/9 Sunny
35°23°0.4 mm⌄
Wind17 mph SW
Gusts32 mph
UV index8 – Very high
Precip chance36%
Sunrise06:46
Sunset19:19
Tuesday 15/9 Sunny
32°22°0.4 mm⌄
Wind12 mph N
Gusts24 mph
UV index8 – Very high
Precip chance36%
Sunrise06:47
Sunset19:17
Wednesday 16/9 Sunny
32°18°2%⌄
Wind9 mph E
Gusts25 mph
UV index8 – Very high
Precip chance2%
Sunrise06:48
Sunset19:15
Thursday 17/9 Light rain (climatological)
32°21°1.0 mm⌄
Day≈29–35°
Night≈18–24°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
35°23°20%⌄
Day≈32–38°
Night≈20–26°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
35°22°20%⌄
Day≈32–38°
Night≈19–25°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Light rain (climatological)
32°21°1.8 mm⌄
Day≈29–35°
Night≈18–24°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Partly cloudy (climatological)
31°20°20%⌄
Day≈28–34°
Night≈17–23°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Partly cloudy (climatological)
30°20°20%⌄
Day≈27–33°
Night≈17–23°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Light rain (climatological)
29°19°1.5 mm⌄
Day≈26–32°
Night≈16–22°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Partly cloudy (climatological)
34°22°20%⌄
Day≈31–37°
Night≈19–25°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Partly cloudy (climatological)
34°22°20%⌄
Day≈31–37°
Night≈19–25°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Light rain (climatological)
34°22°2.0 mm⌄
Day≈31–37°
Night≈19–25°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Partly cloudy (climatological)
33°21°20%⌄
Day≈30–36°
Night≈18–24°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Partly cloudy (climatological)
32°21°20%⌄
Day≈29–35°
Night≈18–24°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 29/9 Rain (climatological)
30°19°2.4 mm⌄
Day≈27–33°
Night≈16–22°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 30/9 Partly cloudy (climatological)
30°20°20%⌄
Day≈27–33°
Night≈17–23°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 1/10 Partly cloudy (climatological)
24°14°20%⌄
Day≈21–27°
Night≈11–17°
Precip≈0.8 in / October
(climatological)Typical range for these dates · 1991–2020
Friday 2/10 Rain (climatological)
26°15°2.1 mm⌄
Day≈23–29°
Night≈12–18°
Precip≈0.8 in / October
(climatological)Typical range for these dates · 1991–2020
How does a 30-day outlook work?
The first 14 days are a live model forecast. The back half of the month shows the typical range for those dates — useful for planning, not a literal prediction.
First 14 days: a real forecast, blended from NBM, ECMWF and GFS runs. Trust it most inside three days; by the second week treat it as a lean, not a promise.
Rest of the month: past day 14 we stop pretending to forecast and switch to the climate corridor — the range those dates have produced over three decades computed directly for Fairfax, with mild week-to-week wiggle.
Good question for this page: "Is late August usually humid in Chicago?" Bad question: "Do I need an umbrella on the 29th?" — three weeks out no one knows, and that's the honest answer.