Londonderry · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Londonderry & 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
28°
Sun, Sep 13
Coldest night
8°
Fri, Sep 11
Days with precip
4 / 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
19° 10°
79% precip chance
Sat 12 – Sun 13 Sep
28° 9°
50% precip chance
Sat 19 – Sun 20 Sep
23° 13°
typical range
Sat 26 – Sun 27 Sep
24° 13°
typical range
30 days — Londonderry
14 forecast + 16 climatology
Thu · Today Showers
24°16°37.6 mm⌄
Wind9 mph W
Gusts20 mph
UV index7 – High
Precip chance83%
Sunrise06:17
Sunset19:23
Fri · Tomorrow Partly cloudy
23°16°0.2 mm⌄
Wind10 mph NW
Gusts15 mph
UV index7 – High
Precip chance24%
Sunrise06:18
Sunset19:21
Saturday 5/9 Showers
18°11°4.2 mm⌄
Wind7 mph NW
Gusts16 mph
UV index5 – Moderate
Precip chance79%
Sunrise06:19
Sunset19:19
Sunday 6/9 Sunny
19°10°4.1 mm⌄
Wind12 mph NE
Gusts18 mph
UV index6 – Moderate
Precip chance65%
Sunrise06:21
Sunset19:18
Monday 7/9 Sunny
21°11°6%⌄
Wind9 mph N
Gusts16 mph
UV index6 – High
Precip chance6%
Sunrise06:22
Sunset19:16
Tuesday 8/9 Mostly cloudy
22°13°13%⌄
Wind8 mph W
Gusts15 mph
UV index5 – Moderate
Precip chance13%
Sunrise06:23
Sunset19:14
Wednesday 9/9 Mostly cloudy
24°14°1.5 mm⌄
Wind9 mph W
Gusts33 mph
UV index6 – High
Precip chance63%
Sunrise06:24
Sunset19:12
Thursday 10/9 Showers
22°11°0.5 mm⌄
Wind17 mph W
Gusts36 mph
UV index5 – Moderate
Precip chance46%
Sunrise06:25
Sunset19:11
Friday 11/9 Mostly cloudy
16°8°14%⌄
Wind7 mph NW
Gusts16 mph
UV index4 – Moderate
Precip chance14%
Sunrise06:26
Sunset19:09
Saturday 12/9 Mostly cloudy
19°9°0.9 mm⌄
Wind5 mph SE
Gusts15 mph
UV index5 – Moderate
Precip chance50%
Sunrise06:27
Sunset19:07
Sunday 13/9 Fog
28°16°19%⌄
Wind13 mph W
Gusts31 mph
UV index6 – High
Precip chance19%
Sunrise06:28
Sunset19:05
Monday 14/9 Sunny
26°15°0.3 mm⌄
Wind14 mph W
Gusts24 mph
UV index7 – High
Precip chance36%
Sunrise06:29
Sunset19:03
Tuesday 15/9 Partly cloudy
17°14°30%⌄
Wind5 mph NW
Gusts18 mph
UV index4 – Moderate
Precip chance30%
Sunrise06:30
Sunset19:01
Wednesday 16/9 Sunny
23°14°10%⌄
Wind8 mph NW
Gusts14 mph
UV index6 – High
Precip chance10%
Sunrise06:32
Sunset19:00
Thursday 17/9 Rain (climatological)
23°13°10.7 mm⌄
Day≈20–26°
Night≈10–16°
Precip≈4.2 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
25°15°20%⌄
Day≈22–28°
Night≈12–18°
Precip≈4.2 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
23°14°20%⌄
Day≈20–26°
Night≈11–17°
Precip≈4.2 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Rain (climatological)
23°13°10.3 mm⌄
Day≈20–26°
Night≈10–16°
Precip≈4.2 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Partly cloudy (climatological)
20°11°20%⌄
Day≈17–23°
Night≈8–14°
Precip≈4.2 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Partly cloudy (climatological)
18°10°20%⌄
Day≈15–21°
Night≈7–13°
Precip≈4.2 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Rain (climatological)
19°11°12.8 mm⌄
Day≈16–22°
Night≈8–14°
Precip≈4.2 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Partly cloudy (climatological)
22°13°20%⌄
Day≈19–25°
Night≈10–16°
Precip≈4.2 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Partly cloudy (climatological)
22°13°20%⌄
Day≈19–25°
Night≈10–16°
Precip≈4.2 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Rain (climatological)
24°14°9.3 mm⌄
Day≈21–27°
Night≈11–17°
Precip≈4.2 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Partly cloudy (climatological)
23°13°20%⌄
Day≈20–26°
Night≈10–16°
Precip≈4.2 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Partly cloudy (climatological)
20°12°20%⌄
Day≈17–23°
Night≈9–15°
Precip≈4.2 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 29/9 Rain (climatological)
20°12°8.2 mm⌄
Day≈17–23°
Night≈9–15°
Precip≈4.2 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 30/9 Partly cloudy (climatological)
20°12°20%⌄
Day≈17–23°
Night≈9–15°
Precip≈4.2 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 1/10 Partly cloudy (climatological)
13°5°20%⌄
Day≈10–16°
Night≈2–8°
Precip≈4.2 in / October
(climatological)Typical range for these dates · 1991–2020
Friday 2/10 Rain (climatological)
15°6°11.8 mm⌄
Day≈12–18°
Night≈3–9°
Precip≈4.2 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 Londonderry, 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.