James Bay · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
James Bay & 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
74°
Wed, Aug 19
Coldest night
51°
Fri, Aug 28
Days with precip
2 / 14
of 14 forecast days
Nicest day
Thu, Aug 20
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 22 – Sun 23 Aug
64° 55°
52% precip chance
Sat 29 – Sun 30 Aug
59° 53°
84% precip chance
Sat 5 – Sun 6 Sep
58° 45°
typical range
Sat 12 – Sun 13 Sep
54° 43°
typical range
30 days — James Bay
14 forecast + 16 climatology
Wed · Today Sunny
74°54°9%⌄
Wind5 mph SW
Gusts16 mph
UV index6 – Moderate
Precip chance9%
Sunrise06:12
Sunset20:21
Thu · Tomorrow Sunny
67°56°9%⌄
Wind6 mph NE
Gusts8 mph
UV index6 – High
Precip chance9%
Sunrise06:14
Sunset20:19
Friday 21/8 Sunny
66°58°4.9 mm⌄
Wind13 mph SW
Gusts21 mph
UV index6 – High
Precip chance76%
Sunrise06:15
Sunset20:17
Saturday 22/8 Showers
61°55°0.7 mm⌄
Wind12 mph SW
Gusts19 mph
UV index4 – Moderate
Precip chance52%
Sunrise06:17
Sunset20:15
Sunday 23/8 Sunny
64°55°12%⌄
Wind12 mph S
Gusts17 mph
UV index5 – Moderate
Precip chance12%
Sunrise06:18
Sunset20:13
Monday 24/8 Fog
67°55°13%⌄
Wind12 mph SW
Gusts18 mph
UV index5 – Moderate
Precip chance13%
Sunrise06:19
Sunset20:11
Tuesday 25/8 Mostly cloudy
63°56°18%⌄
Wind8 mph SW
Gusts11 mph
UV index5 – Moderate
Precip chance18%
Sunrise06:21
Sunset20:09
Wednesday 26/8 Sunny
67°55°7%⌄
Wind15 mph SW
Gusts26 mph
UV index5 – Moderate
Precip chance7%
Sunrise06:22
Sunset20:07
Thursday 27/8 Sunny
63°53°8%⌄
Wind15 mph SW
Gusts25 mph
UV index5 – Moderate
Precip chance8%
Sunrise06:24
Sunset20:05
Friday 28/8 Mostly cloudy
59°51°14%⌄
Wind6 mph W
Gusts9 mph
UV index4 – Moderate
Precip chance14%
Sunrise06:25
Sunset20:03
Saturday 29/8 Sunny
59°53°15%⌄
Wind4 mph W
Gusts11 mph
UV index4 – Moderate
Precip chance15%
Sunrise06:26
Sunset20:01
Sunday 30/8 Showers
57°53°3.6 mm⌄
Wind8 mph SE
Gusts9 mph
UV index3 – Moderate
Precip chance84%
Sunrise06:28
Sunset19:59
Monday 31/8 Mostly cloudy
60°55°25%⌄
Wind6 mph SE
Gusts13 mph
UV index4 – Moderate
Precip chance25%
Sunrise06:29
Sunset19:57
Tuesday 1/9 Sunny
63°55°11%⌄
Wind6 mph NE
Gusts7 mph
UV index5 – Moderate
Precip chance11%
Sunrise06:31
Sunset19:55
Wednesday 2/9 Rain (climatological)
53°45°2.1 mm⌄
Day≈47–58°
Night≈39–50°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 3/9 Partly cloudy (climatological)
57°47°20%⌄
Day≈52–63°
Night≈42–53°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 4/9 Partly cloudy (climatological)
59°49°20%⌄
Day≈54–65°
Night≈43–54°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 5/9 Rain (climatological)
58°48°2.5 mm⌄
Day≈52–63°
Night≈42–53°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 6/9 Partly cloudy (climatological)
53°45°20%⌄
Day≈48–59°
Night≈40–50°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 7/9 Partly cloudy (climatological)
50°43°20%⌄
Day≈45–56°
Night≈38–49°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 8/9 Light rain (climatological)
51°44°1.5 mm⌄
Day≈45–56°
Night≈38–49°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 9/9 Partly cloudy (climatological)
52°44°20%⌄
Day≈46–57°
Night≈39–49°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 10/9 Partly cloudy (climatological)
57°47°20%⌄
Day≈52–63°
Night≈42–53°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 11/9 Light rain (climatological)
57°47°1.4 mm⌄
Day≈52–63°
Night≈42–53°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 12/9 Partly cloudy (climatological)
54°46°20%⌄
Day≈49–60°
Night≈40–51°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 13/9 Partly cloudy (climatological)
50°43°20%⌄
Day≈44–55°
Night≈38–48°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 14/9 Light rain (climatological)
47°41°2.0 mm⌄
Day≈41–52°
Night≈36–46°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Partly cloudy (climatological)
47°41°20%⌄
Day≈42–53°
Night≈36–47°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Partly cloudy (climatological)
55°46°20%⌄
Day≈50–61°
Night≈41–52°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Rain (climatological)
57°47°2.3 mm⌄
Day≈52–63°
Night≈42–53°
Precip≈0.8 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 James Bay, 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.