Olean · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Olean & 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
87°
Tue, Sep 1
Coldest night
49°
Tue, Sep 8
Days with precip
6 / 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
74° 51°
19% precip chance
Sat 5 – Sun 6 Sep
75° 55°
88% precip chance
Sat 12 – Sun 13 Sep
66° 50°
typical range
Sat 19 – Sun 20 Sep
67° 51°
typical range
30 days — Olean
14 forecast + 16 climatology
Wed · Today Sunny
77°52°10%⌄
Wind8 mph S
Gusts15 mph
UV index7 – High
Precip chance10%
Sunrise06:33
Sunset19:57
Thu · Tomorrow Showers
72°58°2.4 mm⌄
Wind11 mph SW
Gusts25 mph
UV index7 – High
Precip chance69%
Sunrise06:34
Sunset19:56
Friday 28/8 Fog
71°51°0.4 mm⌄
Wind9 mph NW
Gusts12 mph
UV index5 – Moderate
Precip chance37%
Sunrise06:35
Sunset19:54
Saturday 29/8 Sunny
74°52°7%⌄
Wind3 mph W
Gusts14 mph
UV index6 – High
Precip chance7%
Sunrise06:36
Sunset19:53
Sunday 30/8 Mostly cloudy
73°51°19%⌄
Wind10 mph W
Gusts17 mph
UV index6 – High
Precip chance19%
Sunrise06:37
Sunset19:51
Monday 31/8 Showers
74°62°3.6 mm⌄
Wind10 mph W
Gusts15 mph
UV index5 – Moderate
Precip chance82%
Sunrise06:38
Sunset19:49
Tuesday 1/9 Mostly cloudy
87°68°20%⌄
Wind14 mph W
Gusts34 mph
UV index8 – Very high
Precip chance20%
Sunrise06:39
Sunset19:48
Wednesday 2/9 Sunny
85°67°3.2 mm⌄
Wind12 mph W
Gusts32 mph
UV index7 – High
Precip chance58%
Sunrise06:40
Sunset19:46
Thursday 3/9 Showers
73°65°9.3 mm⌄
Wind9 mph W
Gusts23 mph
UV index5 – Moderate
Precip chance90%
Sunrise06:41
Sunset19:44
Friday 4/9 Fog
69°60°7.1 mm⌄
Wind5 mph E
Gusts8 mph
UV index5 – Moderate
Precip chance91%
Sunrise06:42
Sunset19:43
Saturday 5/9 Fog
62°55°2.5 mm⌄
Wind10 mph SE
Gusts28 mph
UV index4 – Moderate
Precip chance88%
Sunrise06:43
Sunset19:41
Sunday 6/9 Fog
75°56°26%⌄
Wind3 mph SE
Gusts12 mph
UV index6 – High
Precip chance26%
Sunrise06:44
Sunset19:39
Monday 7/9 Mostly cloudy
76°61°20%⌄
Wind3 mph SE
Gusts14 mph
UV index5 – Moderate
Precip chance20%
Sunrise06:45
Sunset19:37
Tuesday 8/9 Mostly cloudy
70°49°0.6 mm⌄
Wind10 mph SE
Gusts34 mph
UV index4 – Moderate
Precip chance56%
Sunrise06:46
Sunset19:36
Wednesday 9/9 Rain (climatological)
68°52°6.1 mm⌄
Day≈62–73°
Night≈46–57°
Precip≈2.5 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 10/9 Partly cloudy (climatological)
70°53°20%⌄
Day≈65–75°
Night≈47–58°
Precip≈2.5 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 11/9 Partly cloudy (climatological)
68°52°20%⌄
Day≈63–74°
Night≈47–57°
Precip≈2.5 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 12/9 Rain (climatological)
66°51°7.6 mm⌄
Day≈61–72°
Night≈46–56°
Precip≈2.5 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 13/9 Partly cloudy (climatological)
65°50°20%⌄
Day≈60–71°
Night≈45–56°
Precip≈2.5 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 14/9 Partly cloudy (climatological)
61°47°20%⌄
Day≈55–66°
Night≈42–53°
Precip≈2.5 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Rain (climatological)
62°48°3.6 mm⌄
Day≈56–67°
Night≈43–54°
Precip≈2.5 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Partly cloudy (climatological)
68°52°20%⌄
Day≈63–74°
Night≈47–57°
Precip≈2.5 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Partly cloudy (climatological)
71°53°20%⌄
Day≈65–76°
Night≈48–59°
Precip≈2.5 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Rain (climatological)
71°53°5.7 mm⌄
Day≈65–76°
Night≈48–59°
Precip≈2.5 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
67°51°20%⌄
Day≈62–73°
Night≈46–57°
Precip≈2.5 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Partly cloudy (climatological)
66°51°20%⌄
Day≈60–71°
Night≈45–56°
Precip≈2.5 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Rain (climatological)
64°49°4.0 mm⌄
Day≈58–69°
Night≈44–55°
Precip≈2.5 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Partly cloudy (climatological)
64°49°20%⌄
Day≈59–69°
Night≈44–55°
Precip≈2.5 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Partly cloudy (climatological)
67°51°20%⌄
Day≈61–72°
Night≈46–56°
Precip≈2.5 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Rain (climatological)
69°52°3.2 mm⌄
Day≈63–74°
Night≈47–58°
Precip≈2.5 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 Olean, 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.