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
84°
Tue, Sep 8
Coldest night
42°
Thu, Sep 10
Days with precip
1 / 14
of 14 forecast days
Nicest day
Mon, Aug 31
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 5 – Sun 6 Sep
82° 54°
1% precip chance
Sat 12 – Sun 13 Sep
80° 49°
8% precip chance
Sat 19 – Sun 20 Sep
64° 38°
typical range
Sat 26 – Sun 27 Sep
64° 38°
typical range
30 days — Helena
14 forecast + 16 climatology
Mon · Today Sunny
78°48°0%⌄
Wind8 mph SW
Gusts16 mph
UV index6 – High
Precip chance0%
Sunrise06:47
Sunset20:09
Tue · Tomorrow Mostly cloudy
83°54°6%⌄
Wind9 mph S
Gusts16 mph
UV index7 – High
Precip chance6%
Sunrise06:48
Sunset20:08
Wednesday 2/9 Showers
80°50°0.4 mm⌄
Wind25 mph W
Gusts34 mph
UV index5 – Moderate
Precip chance36%
Sunrise06:49
Sunset20:06
Thursday 3/9 Mostly cloudy
77°44°5%⌄
Wind10 mph SW
Gusts18 mph
UV index6 – High
Precip chance5%
Sunrise06:50
Sunset20:04
Friday 4/9 Sunny
82°43°2%⌄
Wind11 mph S
Gusts18 mph
UV index7 – High
Precip chance2%
Sunrise06:52
Sunset20:02
Saturday 5/9 Sunny
81°55°0%⌄
Wind9 mph S
Gusts18 mph
UV index7 – High
Precip chance0%
Sunrise06:53
Sunset20:00
Sunday 6/9 Sunny
82°54°1%⌄
Wind15 mph W
Gusts29 mph
UV index7 – High
Precip chance1%
Sunrise06:54
Sunset19:58
Monday 7/9 Sunny
83°54°1%⌄
Wind16 mph W
Gusts23 mph
UV index7 – High
Precip chance1%
Sunrise06:55
Sunset19:56
Tuesday 8/9 Sunny
84°62°0.5 mm⌄
Wind12 mph SW
Gusts25 mph
UV index7 – High
Precip chance36%
Sunrise06:57
Sunset19:54
Wednesday 9/9 Showers
67°48°11.1 mm⌄
Wind7 mph N
Gusts10 mph
UV index4 – Moderate
Precip chance89%
Sunrise06:58
Sunset19:52
Thursday 10/9 Mostly cloudy
56°42°25%⌄
Wind7 mph N
Gusts16 mph
UV index3 – Moderate
Precip chance25%
Sunrise06:59
Sunset19:50
Friday 11/9 Mostly cloudy
76°44°1.0 mm⌄
Wind8 mph S
Gusts8 mph
UV index5 – Moderate
Precip chance56%
Sunrise07:01
Sunset19:48
Saturday 12/9 Sunny
74°53°8%⌄
Wind15 mph W
Gusts23 mph
UV index6 – High
Precip chance8%
Sunrise07:02
Sunset19:46
Sunday 13/9 Sunny
80°49°1%⌄
Wind6 mph SW
Gusts17 mph
UV index7 – High
Precip chance1%
Sunrise07:03
Sunset19:44
Monday 14/9 Rain (climatological)
70°43°3.5 mm⌄
Day≈65–76°
Night≈37–48°
Precip≈1.1 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Partly cloudy (climatological)
73°44°20%⌄
Day≈67–78°
Night≈39–50°
Precip≈1.1 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Partly cloudy (climatological)
75°46°20%⌄
Day≈69–80°
Night≈40–51°
Precip≈1.1 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Rain (climatological)
69°42°2.1 mm⌄
Day≈64–75°
Night≈37–48°
Precip≈1.1 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
65°40°20%⌄
Day≈60–71°
Night≈34–45°
Precip≈1.1 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
62°38°20%⌄
Day≈56–67°
Night≈32–43°
Precip≈1.1 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Rain (climatological)
64°39°3.7 mm⌄
Day≈58–69°
Night≈34–44°
Precip≈1.1 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Partly cloudy (climatological)
68°41°20%⌄
Day≈62–73°
Night≈36–47°
Precip≈1.1 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Partly cloudy (climatological)
74°45°20%⌄
Day≈69–79°
Night≈40–50°
Precip≈1.1 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Rain (climatological)
75°46°3.4 mm⌄
Day≈69–80°
Night≈40–51°
Precip≈1.1 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Partly cloudy (climatological)
72°44°20%⌄
Day≈67–77°
Night≈38–49°
Precip≈1.1 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Partly cloudy (climatological)
68°41°20%⌄
Day≈62–73°
Night≈36–47°
Precip≈1.1 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Light rain (climatological)
63°38°1.9 mm⌄
Day≈58–69°
Night≈33–44°
Precip≈1.1 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Partly cloudy (climatological)
64°39°20%⌄
Day≈59–69°
Night≈34–45°
Precip≈1.1 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Partly cloudy (climatological)
68°41°20%⌄
Day≈62–73°
Night≈36–47°
Precip≈1.1 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 29/9 Rain (climatological)
70°43°2.7 mm⌄
Day≈65–76°
Night≈37–48°
Precip≈1.1 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.