Olney weather in October

In October, Olney sees average daytime highs of 66°F and overnight lows near 49°F, with 3.5 in of rain across 7.8 wet days and about 11 hours of daylight. It is the 6th-warmest and 8th-wettest month of the year here.

Highs ease over the month, from about 71°F in the first days to 61°F by the end. The sky is clear or mostly clear about 42% of the time in October, and the air most often feels dry.

Daylight stretches from about 11 h 36 min at the start of October to 10 h 24 min by month's end. Set against the rest of the year, October is Olney's 1st-clearest and 7th-windiest month. For the whole year in context, see Olney's year-round climate.

Daytime high
66°
6th warmest
Overnight low
49°
7th coldest
Rainfall
3.5 in
7.8 wet days
Daylight
11 hours
6:25 AM – 5:22 PM
Cloud cover
52%
1st clearest
Wind
7 mph
7th windiest
Solar energy
3.31 kWh/m²
Travel score
6.4
out of 10

Olney is census-designated place and unincorporated area in Montgomery County, Maryland, United States, suburb of Washington, DC.

Density
804/km²
people per km²
Founded
1832

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 71°F in the first days to 61°F by the end.

A typical October day in Olney reaches about 66°F in the afternoon and slips back to 49°F overnight — a 17°F spread between the day's warmth and the night's chill. On most days the high lands between 56°F and 77°F. Set against its neighbours, October runs about 11°F cooler than September and about 12°F warmer than November.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
17255
27255
37154
47154
57153
67053
77053
86952
96952
106951
116851
126850
136750
146750
156749
166649
176648
186548
196548
206547
216447
226447
236346
246346
256346
266245
276245
286244
296144
306144
316044

How October really feels in Olney

Once humidity and wind are folded in, October averages 0 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
0
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

October sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Olney weather by month

How October compares with the rest of the year at a glance. October is the 6th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan41° / 28°3.18.43.19.60.1
Feb44° / 29°2.98.43.210.50.9
Mar53° / 36°3.910.22.311.73.0
Apr65° / 46°3.410.20.2135.7
May73° / 56°3.811.3014.16.5
Jun82° / 65°3.711.2014.75.7
Jul87° / 69°4.111.6014.54.7
Aug84° / 68°3.610.5013.55.4
Sep78° / 61°4.59.6012.36.9
Oct66° / 49°3.57.80116.4
Nov55° / 39°3.07.60.39.93.7
Dec45° / 32°3.68.91.99.31.1

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 42% of the time in October, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 14% of October, with mostly cloudy or overcast conditions the remaining 44%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15446
25545
35644
45644
55743
65743
75743
85644
95743
105743
115743
125743
135743
145644
155644
165644
175644
185644
195644
205644
215545
225545
235545
245545
255545
265446
275446
285446
295347
305347
315347

Chance of precipitation in October

Any precipitation

Olney gets around 3.5 in of rain over 7.8 wet days in October. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 26% and peaks near 29% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
129
229
328
427
526
626
725
825
925
1025
1125
1225
1326
1426
1526
1626
1726
1826
1926
2026
2126
2226
2326
2426
2526
2626
2726
2826
2925
3025
3125

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

Most of October feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, October lands in the dry band about 76% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1561716101
258171591
360171481
460171481
563161371
665161261
765161261
867161151
970151041
1070151041
117215931
127315831
137414831
147614721
157714621
167813621
178113510
188212510
198312410
208411410
218411410
228411410
238610310
248610310
258710300
268710300
27889300
28899200
29899200
30899200
31908200

Wind in October

Winds average 7 mph in October.

Across October, daily wind ranges from about 6 mph on the calmest days to 7 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in October

DaylightNight

Daylight runs from about 11 h 36 min at the start of October to 10 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 72 minutes over October. Sunrise moves from 6:09 AM to 6:41 AM, and sunset from 5:45 PM to 5:03 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.66:095:45
211.66:105:44
311.56:115:42
411.56:125:40
511.46:135:39
611.46:145:37
711.36:155:36
811.36:165:34
911.36:175:32
1011.26:185:31
1111.26:195:29
1211.16:205:28
1311.16:215:26
1411.06:235:25
1511.06:245:23
1611.06:255:22
1710.96:265:21
1810.96:275:19
1910.86:285:18
2010.86:295:16
2110.86:305:15
2210.76:315:14
2310.76:325:12
2410.66:335:11
2510.66:345:10
2610.66:355:09
2710.56:375:07
2810.56:385:06
2910.46:395:05
3010.46:405:04
3110.46:415:03

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 3.31 kWh/m².

For context, solar energy here swings from a low near 1.92 kWh/m² to a high of 6.14 kWh/m² in June across the year — October's 3.31 kWh/m² falls in the middle.

01234151015202531
Solar energy (kWh/m²)Level
13.8Moderate
23.7Moderate
33.7Moderate
43.7Moderate
53.6Moderate
63.6Moderate
73.6Moderate
83.6Moderate
93.5Moderate
103.5Moderate
113.5Moderate
123.4Moderate
133.4Moderate
143.4Moderate
153.3Moderate
163.3Moderate
173.3Moderate
183.2Moderate
193.2Moderate
203.2Moderate
213.1Moderate
223.1Moderate
233.1Moderate
243.0Moderate
253.0Moderate
263.0Moderate
272.9Moderate
282.9Moderate
292.9Moderate
302.8Moderate
312.8Moderate
Planning a trip in October

Hazard calendar for Olney

In seasonPeak

In October, Olney sits inside its atlantic hurricane season. The full year is below, with each hazard's peak months called out.

Olney sits in the Atlantic hurricane belt; the season peaks August–October.

Atlantic hurricane
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is October a good time to visit Olney?

Our two travel scores rate October for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

6.4
Sightseeing
3rd-best month of the year
2.8
Beach & pool
6th-best month of the year

October is a reasonable time to visit Olney for sightseeing.

What to pack for Olney in October

From October's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In October, Olney sees daytime highs around 66°F and nights near 49°F. Little to plan around — just the basics. About 8 days see rain.

Sea temperature near Olney in October

The nearest coast averages about 65°F in October — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 37 mi away) is warmest in August at about 78°F and coldest in February near 36°F.

It's comfortable for a long swim from Jun 16 to Oct 5 — about 3.7 months when the water holds above 68°F.

30°40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan38Bracing
Feb36Bracing
Mar40Bracing
Apr47Bracing
May58Bracing
Jun68Refreshing
Jul76Warm
Aug78Warm
Sep74Refreshing
Oct65Cool
Nov53Bracing
Dec44Bracing

UV index in Olney in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Olney peaks around July 11 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateLowJul 11UV 9Dec 19UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5High
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug7High
Sep6High
Oct4Moderate
Nov3Moderate
Dec2Low

Air quality in Olney in October

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where October falls, not just the annual average.

Air quality in Olney is worst in July — around 17 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (November, 9 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1317 µg/m³Nov 129 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb12Moderate
Mar13Moderate
Apr13Moderate
May15Moderate
Jun16Moderate
Jul17Moderate
Aug15Moderate
Sep12Moderate
Oct9Good
Nov9Good
Dec10Good
Location & terrain

Where is Olney?

Olney sits at 39.2°N, 77.1°W, 541 ft above sea level, in United States. The nearest listed city is Redland, 4.3 mi away.

Topography around Olney

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Olney.

Within 2 miles, the terrain around Olney has only modest variations in elevation — a maximum elevation change of 256 ft around an average of 476 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 541 ft; within 50 miles, large variations in elevation — a maximum elevation change of 2,313 ft.

The land around Olney is covered by trees (72%) and grassland (20%) within 2 miles, trees (68%) within 10 miles, and trees (58%) within 50 miles.

2 miles
256 ft
10 miles
541 ft
50 miles
2,313 ft
treesgrasslandcroplandartificial surfaceswater
October weather nearby: Redland 4.3 mi · Cloverly 5.0 mi · Aspen Hill 5.0 mi · Rockville 6.8 mi · Montgomery Village 6.8 mi · Gaithersburg 7.5 mi · Wheaton 8.1 mi · Fairland 8.1 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Olney (39.1532°, -77.0669°, elevation 541 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).