Weather in Rockville

14-day forecast · updated today, Wednesday, October 28, at 7:05 pm (EDT)

Now · clear 69 °F

Feels like: 69 °F
Low / high: 53 / 77 °F
Rain: 0%
Wind: 8 mph ENE

↗ 30.19 inHg · rising

Today in Rockville: mainly clear, 53 °F to 77 °F, with a 0% chance of rain and a gentle breeze from the east-northeast (8 mph). Tomorrow, mainly clear, 61 °F to 78 °F and a 1% chance of rain. The warmest day of the week is Thursday 29, at 78 °F. Next likely rain: Sunday 1 (31%).

Temperatures for the next 14 days

77° 53°
Today
78° 61°
Thu 29
78° 60°
Fri 30
75° 63°
Sat 31
73° 62°
Sun 1
73° 63°
Mon 2
76° 62°
Tue 3
76° 64°
Wed 4
74° 63°
Thu 5
73° 58°
Fri 6
71° 54°
Sat 7
70° 52°
Sun 8
67° 53°
Mon 9
68° 50°
Tue 10

Day by day

Day	Sky	Low / high	Rain	Max wind	Max wave	High tides	Model
Today · 28	Mainly clear	53 / 77 °F	0%	13 mph NE	2.9 ft	10:20 am · 10:32 pm	HRRR
Thu 29	Mainly clear	61 / 78 °F	1%	13 mph NE	2.8 ft	11:16 am · 11:30 pm	HRRR + NBM
Fri 30	Overcast	60 / 78 °F	0%	9 mph NE	2.0 ft	12:17 pm	NBM
Sat 31	Overcast	63 / 75 °F	3%	18 mph NE	2.8 ft	12:33 am · 1:23 pm	NBM
Sun 1	Light drizzle	62 / 73 °F	31% · 0.77 in	17 mph NE	3.0 ft	1:40 am · 1:28 pm	NBM
Mon 2	Overcast	63 / 73 °F	37% · 1.32 in	18 mph NE	2.9 ft	1:48 am · 2:30 pm	NBM
Tue 3	Mainly clear	62 / 76 °F	10% · 0.03 in	17 mph NE	2.7 ft	2:52 am · 3:29 pm	NBM
Wed 4	Partly cloudy	64 / 76 °F	21% · 0.10 in	14 mph ENE	2.7 ft	3:54 am · 4:24 pm	NBM
Thu 5	Drizzle	63 / 74 °F	28% · 0.38 in	12 mph S	4.1 ft	4:50 am · 5:15 pm	NBM
Fri 6	Drizzle	58 / 73 °F	22% · 0.06 in	9 mph SW	4.1 ft	5:40 am · 6:01 pm	NBM
Sat 7	Light drizzle	54 / 71 °F	4% · 0.04 in	8 mph NW	2.8 ft	6:25 am · 6:43 pm	NBM
Sun 8	Overcast	52 / 70 °F	5% · 0.03 in	8 mph N	2.0 ft	7:06 am · 7:24 pm	NBM + ECMWF
Mon 9	Partly cloudy	53 / 67 °F	12%	9 mph N	2.2 ft	7:46 am · 8:04 pm	ECMWF
Tue 10	Overcast	50 / 68 °F	8%	6 mph NNE	1.8 ft	8:23 am · 8:44 pm	ECMWF

Each hour comes from the best model for this spot: HRRR until Thursday 29 2:00 pm; then NBM until Sunday 8 2:00 pm; then ECMWF until Thursday 12 10:00 am; then GFS.

Each day comes from the best model covering this spot: regional ones first (HRRR and NBM in the U.S., AROME, ICON-EU), then ECMWF; day 16, NOAA GFS. Waves: Météo-France up to day 10, then ECMWF WAM, coarser and further offshore. High tides: our own tide calculation.

Today, every 3 hours

Time	12:00 am	3:00 am	6:00 am	9:00 am	12:00 pm	3:00 pm	6:00 pm	9:00 pm
Sky	Clear	Clear	Clear	Clear sky	Mainly clear	Mainly clear	Clear sky	Clear
Temperature	55°	53°	54°	60°	71°	77°	73°	67°
Chance of rain	0%	0%	0%	0%	0%	0%	0%	0%
Rain	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in
Wind (mph)	3 NNE	3 NNE	5 NE	7 NNE	10 NE	11 NE	11 ENE	8 NE
Humidity	76%	87%	90%	95%	86%	68%	68%	81%
UV	0	0	0	1	5	3	0	0
Model	HRRR	HRRR	HRRR	HRRR	HRRR	HRRR	HRRR	HRRR

Do the models agree?

High confidence

The models agree for the next few days: the forecast is fairly solid.

What 6 forecast models say for the next few days. The closer they are, the more reliable the forecast.

HighRainWind

Do the models agree? · High
High (°F)	Today	Thu 29	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3
ECMWF	78°	80°	79°	76°	74°	77°	78°
AIFS	78°	79°	79°	76°	74°	74°	76°
GFS	77°	77°	78°	75°	75°	71°	72°
ICON	77°	78°	78°	74°	74°	71°	77°
HRRR	77°	79°	—	—	—	—	—
NBM	76°	78°	78°	75°	73°	73°	76°
Confidence	high	high	high	high	high	high	high

Do the models agree? · Rain
Rain	Today	Thu 29	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3
ECMWF	0	0	0	0	0.01 in	0	0
AIFS	0	0	0	0	0.02 in	0	0.05 in
GFS	0	0.01 in	0	0	0.00 in	2.56 in	0.14 in
ICON	0	0	0	0	0	1.12 in	0.71 in
HRRR	0	0	—	—	—	—	—
NBM	0	0	0	0	0.77 in	1.32 in	0.03 in
Confidence	high	high	high	high	high	low	low

Do the models agree? · Wind
Wind (mph)	Today	Thu 29	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3
ECMWF	1125	922	819	1126	1119	1526	1229
AIFS	11	10	7	11	12	12	15
GFS	1528	1328	1122	1833	1630	2844	1426
ICON	1022	823	716	1126	923	1126	1024
HRRR	1328	1226	—	—	—	—	—
NBM	1525	1321	916	1828	1729	1828	1726
Confidence	high	high	high	high	medium	high	high

Chance of rain from the ensemble models

Model	Today	Thu 29	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3
ECMWF (51 scenarios)	6%	2%	2%	6%	12%	24%	23%
GFS (GEFS, 31 scenarios)	0%	3%	3%	13%	65%	60%	19%
NBM (NOAA)	0%	1%	0%	3%	31%	37%	10%
Thunderstorm (NBM)	0%	0%	1%	2%	7%	6%	5%

Each model's day runs midnight to midnight local time; models that reach fewer days are left blank. Rain: daily total. Wind: the day's highest average wind and, in small type, the strongest gust. Highlighted: values that stand out from the rest. The chance of rain comes from many runs of the same model with slightly different starting data.

Outlook

How the coming weeks and months compare with what is normal for the time of year. It is a trend, not a day-by-day forecast.

Next few weeks, compared with normal: a bit warmer, wetter and a slightly warmer sea.

Next 6 weeks

When	TemperatureTemp.	Rain	Sea	Typical high / low
Nov 2 – Nov 8Nov 2–Nov 8	Above +4.7 °F	Above +96%	A bit above +0.7 °F	—
Nov 9 – Nov 15Nov 9–Nov 15	Normal −0.5 °F	A bit above +35%	A bit above +0.7 °F	66° / 59°
Nov 16 – Nov 22Nov 16–Nov 22	A bit above +0.9 °F	Normal	Normal +0.4 °F	66° / 59°
Nov 23 – Nov 29Nov 23–Nov 29	Normal +0.7 °F	Above +91%	Normal +0.4 °F	64° / 58°
Nov 30 – Dec 6Nov 30–Dec 6	Normal 0.0 °F	Well above +108%	Normal 0.0 °F	62° / 56°

Coming months

When	TemperatureTemp.	Rain	Sea
November	A bit above +0.9 °F	Above +68%	—
December	Normal +0.2 °F	A bit above +50%	—
January	Normal −0.4 °F	Above +62%	—
February	Normal −0.7 °F	Above +82%	—
March	Normal −0.4 °F	Above +56%	—

Weeks: ECMWF 46-day (average of its scenarios), against the normal of the last 20 years for those dates. Months: ECMWF SEAS5. Rain: total against normal. The further ahead, the closer it gets to normal and the less detail it can give.

Rockville climate by monthClimate by month

Normal weather for each month (1991–2020 averages)

The best time to visit Rockville is from April to May and in October: highs of 75 °F to 82 °F, about 8 rainy days a month and 8 hours of sunshine a day.

Hurricane season: from May to September, peaking in August. In the last 30 years (1996–2025), 28 tropical cyclones passed within 93 mi of Rockville, about 9 every 10 years; 7 of them with hurricane-force winds (74 mph or more). The most recent: Chantal, in July 2025.

59° 39°

JanJ
62° 42°

FebF
69° 48°

MarM
75° 54°

AprA
82° 63°

MayM
87° 70°

JunJ
90° 73°

JulJ
89° 73°

AugA
85° 69°

SepS
78° 58°

OctO
69° 48°

NovN
62° 42°

DecD

Highs and lows
Monthly rainfall
Best time

Month	High	Low	Rain	Rainy daysDays	Sun (h/day)	Water	Waves	Cyclones
JanuaryJan	59°	39°	3.27 in	8	4.9	60°	3.3 ft	–
FebruaryFeb	62°	42°	3.03 in	7	5.3	59°	3.3 ft	–
MarchMar	69°	48°	3.52 in	8	6.9	61°	3.2 ft	–
AprilApr	75°	54°	3.29 in	7	8.1	66°	3.2 ft	–
MayMay	82°	63°	3.22 in	9	9.1	73°	2.9 ft	4
JuneJun	87°	70°	5.93 in	16	8.1	80°	2.6 ft	3
JulyJul	90°	73°	6.27 in	17	8.6	83°	2.7 ft	4
AugustAug	89°	73°	7.71 in	17	7.4	83°	2.7 ft	7
SeptemberSep	85°	69°	5.48 in	11	6.3	81°	3.3 ft	6
OctoberOct	78°	58°	3.26 in	7	6.0	75°	3.4 ft	3
NovemberNov	69°	48°	2.48 in	6	5.8	67°	3.6 ft	1
DecemberDec	62°	42°	3.52 in	8	4.6	63°	3.3 ft	–

Month	Water	Waves	Cyclones
Jan	60°	3.3 ft	–
Feb	59°	3.3 ft	–
Mar	61°	3.2 ft	–
Apr	66°	3.2 ft	–
May	73°	2.9 ft	4
Jun	80°	2.6 ft	3
Jul	83°	2.7 ft	4
Aug	83°	2.7 ft	7
Sep	81°	3.3 ft	6
Oct	75°	3.4 ft	3
Nov	67°	3.6 ft	1
Dec	63°	3.3 ft	–

Days: rainy days in the month. Sun: hours a day.

A normal year brings 50.99 in of rain on about 120 days and about 2,450 hours of sunshine.

Cyclones: how many tropical cyclones (tropical storms, hurricanes and typhoons) passed within 93 mi in each month from 1996 to 2025, according to IBTrACS (NOAA).

1991–2020 averages. Highs, lows and rainfall: TerraClimate; rainy days (0.04 in or more): NASA POWER (MERRA-2); sunshine hours: estimated from solar radiation; water: NOAA OISST; waves (average height): ERA5, 2011–2020. Normals are not a forecast: any given year can turn out very different. Sources and licenses

Temperature

Now69 °Ffeels like 69 °F

Tomorrow61 / 78 °F

It's 69 °F now (feels like 69 °F). Today, 53 °F to 77 °F; tomorrow, 61 °F to 78 °F.

Chance of rain

Today 0%
Thu 29 1%
Fri 30 0%
Sat 31 3%
Sun 1 31% 0.77 in
Mon 2 37% 1.32 in
Tue 3 10% 0.03 in

Today the chance of rain reaches 0%. The next day with likely rain is Sunday 1: 31% and 0.77 in.

No rain in the last 7 days.

Humidity and dew point

Humidity73%

Dew point60 °F

Humidity is 73% now and the dew point is 60 °F.

The dew point is the temperature at which the air becomes saturated: the higher it is, the heavier the air feels.

Visibility and fog

Now13 migood

Clouds3%

Visibility is good now (13 mi). No fog expected today.

UV index

Now0

Today's peak5moderate

Thu 29: 4 · Fri 30: 5 · Sat 31: 4

Index	Level	What to do
0–2	low	No special protection needed.
3–5	moderate	Hat, sunglasses and sunscreen around midday.
6–7	high	Sunscreen, hat and shade between 12 and 4 pm.
8–10	very high	Avoid the midday sun; reflection off the water adds to it.
11+	extreme	Avoid the sun between 11 am and 5 pm; protect yourself even if it is cloudy.

Reflection off water and sand adds radiation: protect yourself more on a boat or at the beach.

Barometric pressure

↗ Rising · now Anglers say fish bite less for a while
→ Steady Anglers expect normal activity
↘ Falling Anglers say fish feed more before the change

30.1030.2030.30 30.11

Rising now (+0.03 inHg in 3 hours). Over the next 48 hours: −0.04 inHg. Rising pressure: anglers say fish bite less for a while. Fast changes, either way, tend to affect fishing.

Air and pollen

Air qualityGood · 49

Saharan dustNo

Previous days

The weather over the last 30 days, as the models analyzed it. Tap a day to see it hour by hour.

Day	Sky	Low / high	Max wind
Tue 27	Partly cloudy	51 / 76 °F	8 mph NNE
Mon 26	Clear sky	55 / 75 °F	10 mph NNE
Sun 25	Overcast	56 / 74 °F	12 mph NNE
Sat 24	Clear sky	54 / 74 °F	12 mph NNE
Fri 23	Clear sky	48 / 71 °F	9 mph NNE
Thu 22	Clear sky	46 / 74 °F	7 mph NNE
Wed 21	Partly cloudy	51 / 73 °F	8 mph NNE

Show all 30 days

Day	Sky	Low / high	Rain	Max wind
Tue 20	Clear sky	48 / 75 °F	0	9 mph N
Mon 19	Clear sky	49 / 69 °F	0	10 mph NNE
Sun 18	Mainly clear	49 / 67 °F	0	12 mph NNE
Sat 17	Light drizzle	56 / 74 °F	0.01 in	14 mph NNW
Fri 16	Mainly clear	67 / 86 °F	0	8 mph SW
Thu 15	Clear sky	66 / 88 °F	0	6 mph SW
Wed 14	Overcast	63 / 88 °F	0	6 mph SW
Tue 13	Clear sky	63 / 87 °F	0	5 mph NNW
Mon 12	Clear sky	63 / 85 °F	0	8 mph WNW
Sun 11	Thunderstorm	68 / 80 °F	0.58 in	12 mph SW
Sat 10	Showers	71 / 83 °F	1.26 in	12 mph E
Fri 9	Light drizzle	67 / 75 °F	0.01 in	10 mph NE
Thu 8	Overcast	62 / 81 °F	0	6 mph NE
Wed 7	Overcast	65 / 82 °F	0	10 mph NNE
Tue 6	Overcast	64 / 76 °F	0	10 mph NE
Mon 5	Rain	67 / 73 °F	1.71 in	8 mph NNE
Sun 4	Showers	71 / 80 °F	1.75 in	5 mph WNW
Sat 3	Showers	73 / 77 °F	0.85 in	6 mph SSW
Fri 2	Drizzle	71 / 85 °F	0.12 in	6 mph SSE
Thu 1	Light drizzle	65 / 87 °F	0.02 in	6 mph ENE
Wed 30	Partly cloudy	67 / 86 °F	0	6 mph E
Tue 29	Overcast	61 / 87 °F	0	8 mph E
Mon 28	Partly cloudy	58 / 87 °F	0	6 mph N

These are the models at the start of each day (ECMWF and GFS; waves from Météo-France), not readings from a weather station: there can be differences at specific spots.

Questions about the weather in RockvilleQuestions

What's the weather like today in Rockville?

Mainly clear, from 53 °F to 77 °F, with a gentle breeze from the east-northeast (8 mph) and a 0% chance of rain.

Will it rain tomorrow in Rockville?

On Thursday 29 the chance of rain is 1% (0.00 in): mainly clear.

How warm will it be this week?

Between a low of 53 °F and a high of 78 °F; the warmest day, Thursday 29.

What's the UV index today?

It reaches 5 (moderate). Hat, sunglasses and sunscreen around midday.

Is the pressure rising or falling?

It's 30.19 inHg and rising: −0.03 inHg over the last 24 hours.

When is the best time to visit Rockville?

The best time to visit Rockville is from April to May and in October: highs of 75 °F to 82 °F, about 8 rainy days a month and 8 hours of sunshine a day.

What is the weather like in Rockville in October?

In October, Rockville normally sees highs of 78 °F and lows of 58 °F, with about 7 rainy days (3.26 in for the month) and 6 hours of sunshine a day. The sea is around 75 °F. These are 1991–2020 averages.

What are the warmest and wettest months in Rockville?

The warmest is July, with average highs of 90 °F, and the coldest January, with lows of 39 °F. The wettest is August (7.71 in) and the driest, November.

When is hurricane season in Rockville?

Hurricane season: from May to September, peaking in August. In the last 30 years (1996–2025), 28 tropical cyclones passed within 93 mi of Rockville, about 9 every 10 years; 7 of them with hurricane-force winds (74 mph or more). The most recent: Chantal, in July 2025.

More about Rockville today

Weather near Rockville

Only places with a different forecast: spots a few miles apart share the same model cell and wouldn't add anything.

Learn more

Weather: Open-Meteo, CC BY 4.0, with the best model for each spot and lead time (NOAA HRRR and NBM in the U.S., Météo-France AROME, DWD ICON-EU, ECMWF IFS and NOAA GFS); ECMWF grid point 11 mi away. The comparison also uses ICON (DWD), AIFS (ECMWF) and ARPEGE (Météo-France). Outlook: ECMWF 46-day and SEAS5. Chance of rain from ensemble models (ECMWF, GEFS and NBM). UV, air quality and pollen: CAMS (Copernicus).

Forecast from Open-Meteo (CC BY 4.0) with models from ECMWF, NOAA, Météo-France, DWD, Copernicus Marine and CAMS. Updated at 7:05 pm (local time).

Spotted a mistake? Tell us · Where the weather and sea data come from