Lewiston · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Lewiston & 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
99°
Tue, Aug 25
Coldest night
43°
Sun, Sep 6
Days with precip
1 / 14
of 14 forecast days
Nicest day
Sun, Aug 30
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 29 – Sun 30 Aug
73° 51°
4% precip chance
Sat 5 – Sun 6 Sep
62° 43°
24% precip chance
Sat 12 – Sun 13 Sep
66° 46°
typical range
Sat 19 – Sun 20 Sep
66° 45°
typical range
30 days — Lewiston
14 forecast + 16 climatology
Tue · Today Sunny
99°68°1.9 mm⌄
Wind7 mph E
Gusts15 mph
UV index7 – High
Precip chance57%
Sunrise05:59
Sunset19:40
Wed · Tomorrow Sunny
91°67°4%⌄
Wind15 mph NW
Gusts24 mph
UV index6 – High
Precip chance4%
Sunrise06:00
Sunset19:38
Thursday 27/8 Sunny
81°66°1%⌄
Wind17 mph NW
Gusts23 mph
UV index7 – High
Precip chance1%
Sunrise06:02
Sunset19:37
Friday 28/8 Sunny
78°60°1%⌄
Wind16 mph NW
Gusts26 mph
UV index7 – High
Precip chance1%
Sunrise06:03
Sunset19:35
Saturday 29/8 Sunny
68°57°4%⌄
Wind15 mph W
Gusts20 mph
UV index5 – Moderate
Precip chance4%
Sunrise06:04
Sunset19:33
Sunday 30/8 Sunny
73°51°2%⌄
Wind6 mph N
Gusts18 mph
UV index6 – High
Precip chance2%
Sunrise06:05
Sunset19:31
Monday 31/8 Mostly cloudy
86°56°5%⌄
Wind8 mph NW
Gusts16 mph
UV index7 – High
Precip chance5%
Sunrise06:07
Sunset19:29
Tuesday 1/9 Sunny
86°63°1%⌄
Wind20 mph W
Gusts36 mph
UV index7 – High
Precip chance1%
Sunrise06:08
Sunset19:27
Wednesday 2/9 Sunny
67°56°0.3 mm⌄
Wind21 mph W
Gusts32 mph
UV index5 – Moderate
Precip chance36%
Sunrise06:09
Sunset19:25
Thursday 3/9 Sunny
78°52°1%⌄
Wind13 mph NW
Gusts20 mph
UV index7 – High
Precip chance1%
Sunrise06:10
Sunset19:23
Friday 4/9 Showers
69°54°0.5 mm⌄
Wind16 mph NW
Gusts22 mph
UV index6 – High
Precip chance36%
Sunrise06:12
Sunset19:21
Saturday 5/9 Partly cloudy
59°45°0.3 mm⌄
Wind15 mph NW
Gusts26 mph
UV index3 – Moderate
Precip chance24%
Sunrise06:13
Sunset19:20
Sunday 6/9 Mostly cloudy
62°43°0.1 mm⌄
Wind8 mph NE
Gusts17 mph
UV index4 – Moderate
Precip chance19%
Sunrise06:14
Sunset19:18
Monday 7/9 Sunny
73°48°4%⌄
Wind7 mph E
Gusts15 mph
UV index6 – High
Precip chance4%
Sunrise06:16
Sunset19:16
Tuesday 8/9 Light rain (climatological)
65°47°1.2 mm⌄
Day≈60–71°
Night≈41–52°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 9/9 Partly cloudy (climatological)
70°50°20%⌄
Day≈65–76°
Night≈44–55°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 10/9 Partly cloudy (climatological)
71°50°20%⌄
Day≈66–77°
Night≈45–56°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 11/9 Light rain (climatological)
66°47°1.3 mm⌄
Day≈61–72°
Night≈42–53°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 12/9 Partly cloudy (climatological)
66°47°20%⌄
Day≈60–71°
Night≈42–52°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 13/9 Partly cloudy (climatological)
64°46°20%⌄
Day≈58–69°
Night≈40–51°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 14/9 Light rain (climatological)
64°46°1.3 mm⌄
Day≈59–70°
Night≈41–52°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Partly cloudy (climatological)
66°47°20%⌄
Day≈61–71°
Night≈42–53°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Partly cloudy (climatological)
73°51°20%⌄
Day≈67–78°
Night≈46–56°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Light rain (climatological)
70°49°1.6 mm⌄
Day≈64–75°
Night≈44–55°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
70°50°20%⌄
Day≈65–76°
Night≈44–55°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
66°47°20%⌄
Day≈60–71°
Night≈42–52°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Light rain (climatological)
62°45°0.8 mm⌄
Day≈57–68°
Night≈40–50°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Partly cloudy (climatological)
61°44°20%⌄
Day≈55–66°
Night≈39–49°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Partly cloudy (climatological)
67°48°20%⌄
Day≈62–73°
Night≈42–53°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Light rain (climatological)
72°51°1.1 mm⌄
Day≈66–77°
Night≈45–56°
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 Lewiston, 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.