Rockville · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Rockville & 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
91°
Tue, Aug 25
Coldest night
52°
Fri, Aug 28
Days with precip
10 / 14
of 14 forecast days
Nicest day
Thu, Aug 27
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 29 – Sun 30 Aug
90° 60°
70% precip chance
Sat 5 – Sun 6 Sep
87° 61°
69% precip chance
Sat 12 – Sun 13 Sep
69° 48°
typical range
Sat 19 – Sun 20 Sep
71° 49°
typical range
30 days — Rockville
14 forecast + 16 climatology
Mon · Today Mostly cloudy
84°54°15%⌄
Wind13 mph SW
Gusts24 mph
UV index7 – High
Precip chance15%
Sunrise06:29
Sunset20:10
Tue · Tomorrow Sunny
91°62°2.4 mm⌄
Wind16 mph W
Gusts32 mph
UV index7 – High
Precip chance57%
Sunrise06:30
Sunset20:08
Wednesday 26/8 Sunny
85°61°2%⌄
Wind18 mph NW
Gusts29 mph
UV index6 – High
Precip chance2%
Sunrise06:31
Sunset20:06
Thursday 27/8 Sunny
82°57°1%⌄
Wind14 mph N
Gusts26 mph
UV index7 – High
Precip chance1%
Sunrise06:32
Sunset20:04
Friday 28/8 Mostly cloudy
81°52°1.0 mm⌄
Wind11 mph SE
Gusts21 mph
UV index6 – High
Precip chance57%
Sunrise06:34
Sunset20:03
Saturday 29/8 Mostly cloudy
90°62°4.1 mm⌄
Wind14 mph S
Gusts26 mph
UV index7 – High
Precip chance70%
Sunrise06:35
Sunset20:01
Sunday 30/8 Mostly cloudy
74°60°0.8 mm⌄
Wind9 mph E
Gusts23 mph
UV index6 – High
Precip chance61%
Sunrise06:36
Sunset19:59
Monday 31/8 Mostly cloudy
91°64°2.7 mm⌄
Wind10 mph E
Gusts24 mph
UV index8 – Very high
Precip chance62%
Sunrise06:37
Sunset19:57
Tuesday 1/9 Mostly cloudy
87°65°1.3 mm⌄
Wind10 mph W
Gusts17 mph
UV index7 – High
Precip chance57%
Sunrise06:38
Sunset19:55
Wednesday 2/9 Sunny
83°60°2%⌄
Wind12 mph N
Gusts24 mph
UV index7 – High
Precip chance2%
Sunrise06:40
Sunset19:53
Thursday 3/9 Mostly cloudy
69°58°6.1 mm⌄
Wind12 mph SE
Gusts23 mph
UV index5 – Moderate
Precip chance85%
Sunrise06:41
Sunset19:52
Friday 4/9 Showers
65°58°1.3 mm⌄
Wind15 mph E
Gusts30 mph
UV index4 – Moderate
Precip chance79%
Sunrise06:42
Sunset19:50
Saturday 5/9 Sunny
87°61°1.5 mm⌄
Wind16 mph S
Gusts34 mph
UV index8 – Very high
Precip chance61%
Sunrise06:43
Sunset19:48
Sunday 6/9 Sunny
83°61°4.0 mm⌄
Wind7 mph SE
Gusts14 mph
UV index7 – High
Precip chance69%
Sunrise06:45
Sunset19:46
Monday 7/9 Rain (climatological)
73°51°5.7 mm⌄
Day≈68–78°
Night≈46–57°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 8/9 Partly cloudy (climatological)
77°54°20%⌄
Day≈72–83°
Night≈49–59°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 9/9 Partly cloudy (climatological)
76°53°20%⌄
Day≈71–81°
Night≈48–59°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 10/9 Rain (climatological)
75°53°6.8 mm⌄
Day≈70–80°
Night≈47–58°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 11/9 Partly cloudy (climatological)
70°50°20%⌄
Day≈65–76°
Night≈44–55°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 12/9 Partly cloudy (climatological)
68°48°20%⌄
Day≈63–73°
Night≈43–54°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 13/9 Rain (climatological)
69°49°3.1 mm⌄
Day≈64–74°
Night≈44–55°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 14/9 Partly cloudy (climatological)
74°52°20%⌄
Day≈68–79°
Night≈46–57°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Partly cloudy (climatological)
77°54°20%⌄
Day≈72–83°
Night≈49–59°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Rain (climatological)
79°55°5.5 mm⌄
Day≈73–84°
Night≈49–60°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Partly cloudy (climatological)
76°53°20%⌄
Day≈70–81°
Night≈47–58°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
73°52°20%⌄
Day≈68–79°
Night≈46–57°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Rain (climatological)
69°49°5.3 mm⌄
Day≈63–74°
Night≈43–54°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Partly cloudy (climatological)
71°50°20%⌄
Day≈65–76°
Night≈45–55°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Partly cloudy (climatological)
73°51°20%⌄
Day≈67–78°
Night≈46–57°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Rain (climatological)
78°54°4.0 mm⌄
Day≈73–83°
Night≈49–60°
Precip≈2.2 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 Rockville, 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.