Helena · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Helena & 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
41°
Tue, Sep 8
Coldest night
22°
Fri, Aug 28
Days with precip
1 / 14
of 14 forecast days
Nicest day
Sat, Aug 29
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 29 – Sun 30 Aug
38° 23°
4% precip chance
Sat 5 – Sun 6 Sep
40° 27°
57% precip chance
Sat 12 – Sun 13 Sep
39° 24°
typical range
Sat 19 – Sun 20 Sep
40° 24°
typical range
30 days — Helena
14 forecast + 16 climatology
Fri · Today Showers
38°22°0.8 mm⌄
Wind12 mph E
Gusts24 mph
UV index9 – Very high
Precip chance39%
Sunrise06:32
Sunset19:34
Sat · Tomorrow Sunny
38°23°2%⌄
Wind10 mph SW
Gusts22 mph
UV index9 – Very high
Precip chance2%
Sunrise06:33
Sunset19:33
Sunday 30/8 Sunny
38°24°4%⌄
Wind12 mph S
Gusts24 mph
UV index9 – Very high
Precip chance4%
Sunrise06:34
Sunset19:31
Monday 31/8 Sunny
38°24°3%⌄
Wind12 mph S
Gusts24 mph
UV index9 – Very high
Precip chance3%
Sunrise06:34
Sunset19:30
Tuesday 1/9 Sunny
39°26°3%⌄
Wind10 mph SW
Gusts23 mph
UV index9 – Very high
Precip chance3%
Sunrise06:35
Sunset19:29
Wednesday 2/9 Sunny
39°26°2%⌄
Wind11 mph S
Gusts23 mph
UV index9 – Very high
Precip chance2%
Sunrise06:36
Sunset19:27
Thursday 3/9 Sunny
41°27°2%⌄
Wind9 mph W
Gusts21 mph
UV index10 – Very high
Precip chance2%
Sunrise06:37
Sunset19:26
Friday 4/9 Sunny
40°27°5%⌄
Wind9 mph SE
Gusts17 mph
UV index9 – Very high
Precip chance5%
Sunrise06:37
Sunset19:25
Saturday 5/9 Showers
40°27°0.6 mm⌄
Wind7 mph SW
Gusts11 mph
UV index9 – Very high
Precip chance36%
Sunrise06:38
Sunset19:23
Sunday 6/9 Partly cloudy
39°27°1.4 mm⌄
Wind8 mph SW
Gusts18 mph
UV index9 – Very high
Precip chance57%
Sunrise06:39
Sunset19:22
Monday 7/9 Sunny
40°26°0.8 mm⌄
Wind6 mph W
Gusts7 mph
UV index8 – Very high
Precip chance36%
Sunrise06:39
Sunset19:20
Tuesday 8/9 Sunny
41°27°2%⌄
Wind11 mph SW
Gusts19 mph
UV index10 – Very high
Precip chance2%
Sunrise06:40
Sunset19:19
Wednesday 9/9 Sunny
41°27°1%⌄
Wind14 mph S
Gusts24 mph
UV index10 – Very high
Precip chance1%
Sunrise06:41
Sunset19:18
Thursday 10/9 Sunny
41°23°0.3 mm⌄
Wind21 mph N
Gusts30 mph
UV index10 – Very high
Precip chance36%
Sunrise06:41
Sunset19:16
Friday 11/9 Light rain (climatological)
37°23°1.5 mm⌄
Day≈34–40°
Night≈20–26°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 12/9 Partly cloudy (climatological)
39°24°20%⌄
Day≈36–42°
Night≈21–27°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 13/9 Partly cloudy (climatological)
39°24°20%⌄
Day≈36–42°
Night≈21–27°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 14/9 Light rain (climatological)
39°24°1.4 mm⌄
Day≈36–42°
Night≈21–27°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Partly cloudy (climatological)
35°22°20%⌄
Day≈32–38°
Night≈19–25°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Partly cloudy (climatological)
34°21°20%⌄
Day≈31–37°
Night≈18–24°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Light rain (climatological)
36°23°1.5 mm⌄
Day≈33–39°
Night≈20–26°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
38°24°20%⌄
Day≈35–41°
Night≈21–27°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
40°25°20%⌄
Day≈37–43°
Night≈22–28°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Light rain (climatological)
39°24°1.3 mm⌄
Day≈36–42°
Night≈21–27°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Partly cloudy (climatological)
39°24°20%⌄
Day≈36–42°
Night≈21–27°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Partly cloudy (climatological)
36°23°20%⌄
Day≈33–39°
Night≈20–26°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Light rain (climatological)
33°21°1.9 mm⌄
Day≈30–36°
Night≈18–24°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Partly cloudy (climatological)
35°22°20%⌄
Day≈32–38°
Night≈19–25°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Partly cloudy (climatological)
35°22°20%⌄
Day≈32–38°
Night≈19–25°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Light rain (climatological)
38°24°1.1 mm⌄
Day≈35–41°
Night≈21–27°
Precip≈0.6 in / September
(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 Helena, 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.