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
29°
Fri, Aug 21
Coldest night
10°
Tue, Aug 25
Days with precip
6 / 14
of 14 forecast days
Nicest day
Wed, Aug 26
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 22 – Sun 23 Aug
22° 13°
82% precip chance
Sat 29 – Sun 30 Aug
26° 14°
14% precip chance
Sat 5 – Sun 6 Sep
21° 10°
typical range
Sat 12 – Sun 13 Sep
22° 10°
typical range
30 days — Lewiston
14 forecast + 16 climatology
Fri · Today Showers
29°15°0.5 mm⌄
Wind10 mph SE
Gusts18 mph
UV index7 – High
Precip chance36%
Sunrise05:51
Sunset19:36
Sat · Tomorrow Mostly cloudy
22°13°0.9 mm⌄
Wind9 mph SE
Gusts19 mph
UV index5 – Moderate
Precip chance57%
Sunrise05:52
Sunset19:34
Sunday 23/8 Fog
19°15°1.4 mm⌄
Wind8 mph N
Gusts19 mph
UV index3 – Moderate
Precip chance82%
Sunrise05:53
Sunset19:33
Monday 24/8 Fog
23°13°2.9 mm⌄
Wind7 mph NW
Gusts22 mph
UV index7 – High
Precip chance78%
Sunrise05:55
Sunset19:31
Tuesday 25/8 Sunny
22°10°0.5 mm⌄
Wind10 mph W
Gusts25 mph
UV index6 – High
Precip chance36%
Sunrise05:56
Sunset19:29
Wednesday 26/8 Sunny
26°12°3%⌄
Wind6 mph W
Gusts15 mph
UV index7 – High
Precip chance3%
Sunrise05:57
Sunset19:28
Thursday 27/8 Mostly cloudy
26°13°13%⌄
Wind9 mph SE
Gusts16 mph
UV index7 – High
Precip chance13%
Sunrise05:58
Sunset19:26
Friday 28/8 Mostly cloudy
26°13°13%⌄
Wind8 mph SE
Gusts13 mph
UV index6 – High
Precip chance13%
Sunrise05:59
Sunset19:24
Saturday 29/8 Mostly cloudy
26°15°8%⌄
Wind9 mph SE
Gusts19 mph
UV index7 – High
Precip chance8%
Sunrise06:00
Sunset19:22
Sunday 30/8 Mostly cloudy
26°14°14%⌄
Wind10 mph S
Gusts16 mph
UV index6 – High
Precip chance14%
Sunrise06:01
Sunset19:21
Monday 31/8 Fog
18°15°1.4 mm⌄
Wind7 mph SE
Gusts12 mph
UV index4 – Moderate
Precip chance82%
Sunrise06:03
Sunset19:19
Tuesday 1/9 Fog
16°14°1.1 mm⌄
Wind7 mph NE
Gusts20 mph
UV index4 – Moderate
Precip chance83%
Sunrise06:04
Sunset19:17
Wednesday 2/9 Fog
22°14°3.5 mm⌄
Wind8 mph S
Gusts16 mph
UV index5 – Moderate
Precip chance84%
Sunrise06:05
Sunset19:15
Thursday 3/9 Showers
17°12°3.9 mm⌄
Wind11 mph NW
Gusts27 mph
UV index4 – Moderate
Precip chance83%
Sunrise06:06
Sunset19:14
Friday 4/9 Rain (climatological)
19°10°2.7 mm⌄
Day≈16–22°
Night≈7–13°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 5/9 Partly cloudy (climatological)
21°11°20%⌄
Day≈18–24°
Night≈8–14°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 6/9 Partly cloudy (climatological)
20°10°20%⌄
Day≈17–23°
Night≈7–13°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 7/9 Rain (climatological)
19°10°3.4 mm⌄
Day≈16–22°
Night≈7–13°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 8/9 Partly cloudy (climatological)
18°9°20%⌄
Day≈15–21°
Night≈6–12°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 9/9 Partly cloudy (climatological)
17°9°20%⌄
Day≈14–20°
Night≈6–12°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 10/9 Rain (climatological)
17°8°2.1 mm⌄
Day≈14–20°
Night≈5–11°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 11/9 Partly cloudy (climatological)
18°9°20%⌄
Day≈15–21°
Night≈6–12°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 12/9 Partly cloudy (climatological)
19°10°20%⌄
Day≈16–22°
Night≈7–13°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 13/9 Rain (climatological)
22°11°4.2 mm⌄
Day≈19–25°
Night≈8–14°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 14/9 Partly cloudy (climatological)
19°10°20%⌄
Day≈16–22°
Night≈7–13°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Partly cloudy (climatological)
16°8°20%⌄
Day≈13–19°
Night≈5–11°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Rain (climatological)
17°8°2.3 mm⌄
Day≈14–20°
Night≈5–11°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Partly cloudy (climatological)
16°8°20%⌄
Day≈13–19°
Night≈5–11°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
19°10°20%⌄
Day≈16–22°
Night≈7–13°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Rain (climatological)
19°10°4.1 mm⌄
Day≈16–22°
Night≈7–13°
Precip≈1.4 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.