Oakville weather in January

In January, Oakville sees average daytime highs of 40°F and overnight lows near 25°F, with 2.9 in of precipitation across 8.3 wet days and about 9.6 hours of daylight. It is the 12th-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 40°F through the month. The sky is clear or mostly clear about 29% of the time in January, and the air most often feels dry.

Daylight stretches from about 9 h 24 min at the start of January to 10 hours by month's end. Set against the rest of the year, January is Oakville's 9th-clearest and 4th-windiest month. For the whole year in context, see Oakville's year-round climate.

Daytime high
40°
12th warmest
Overnight low
25°
1st coldest
Precipitation
2.9 in
8.3 wet days
Daylight
9 h 36 min
7:23 AM – 4:58 PM
Cloud cover
63%
9th clearest
Wind
8 mph
4th windiest
Solar energy
2.23 kWh/m²
Travel score
0.0
out of 10

Oakville is census-designated place in St. Louis County, Missouri.

Density
787/km²
people per km²

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

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 40°F through the month.

A typical January day in Oakville reaches about 40°F in the afternoon and slips back to 25°F overnight — a 15°F spread between the day's warmth and the night's chill. On most days the high lands between 25°F and 57°F. Set against its neighbours, January runs about 4°F cooler than December and about 5°F cooler than February.

20°40°60°151015202531
Avg high (°F)Avg low (°F)
14126
24126
34126
44026
54026
64026
74026
84025
94025
104025
114025
124025
134025
144025
154024
164024
174024
184024
194024
204024
214024
224024
234025
244025
254025
264125
274125
284125
294125
304125
314226

How January really feels in Oakville

Once humidity and wind are folded in, January averages 0 days that feel above 90°F and 31 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
31
wind chill below the day's low

The story in January is cold — wind chill drags the overnight "feels like" below the raw low.

Oakville weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan40° / 25°2.98.32.89.60.0
Feb45° / 28°2.57.52.710.51.0
Mar56° / 37°3.810.71.211.73.7
Apr67° / 48°4.711.30.2135.9
May76° / 58°5.013.3014.16.3
Jun84° / 67°4.111014.65.3
Jul88° / 71°3.410014.44.6
Aug86° / 68°2.99.3013.55.1
Sep80° / 60°3.27.7012.37.0
Oct68° / 48°3.58.20116.7
Nov55° / 38°3.78.60.79.93.6
Dec44° / 29°2.78.32.29.40.8

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 29% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 12% of January, with mostly cloudy or overcast conditions the remaining 59%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13862
23862
33862
43961
53961
63961
73961
84060
94060
104159
114159
124060
134159
144159
154159
164159
174159
184159
194357
204357
214357
224357
234357
244357
254357
264357
274357
284357
294357
304258
314258

Chance of precipitation in January

Any precipitationSnow

Oakville gets around 2.9 in of rain and snow over 8.3 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 26% and peaks near 29% on the wettest days, and about 3 days bring snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1258
2269
3269
4279
5289
6289
7299
8299
9299
10299
11299
12299
13299
14289
15289
16289
17279
18279
19269
20269
21259
22259
23259
24249
25249
26249
27249
28249
29239
30239
31239

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January lands in the dry band about 99% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
1982
2982
3982
4982
5982
6982
7982
8982
9982
10982
11991
12991
13991
14991
15991
16991
17991
18991
191000
201000
211000
221000
231000
241000
251000
261000
271000
281000
291000
301000
311000

Wind in January

Winds average 8 mph in January.

Across January, daily wind ranges from about 8 mph on the calmest days to 8 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
18light breeze
28light breeze
38light breeze
48light breeze
58light breeze
68light breeze
78light breeze
88light breeze
98light breeze
108light breeze
118light breeze
128light breeze
138light breeze
148light breeze
158light breeze
168light breeze
178light breeze
188light breeze
198light breeze
208light breeze
218light breeze
228light breeze
238light breeze
248light breeze
258light breeze
268light breeze
278light breeze
288light breeze
298light breeze
308light breeze
318light breeze

Sunrise & sunset in January

DaylightNight

Daylight runs from about 9 h 24 min at the start of January to 10 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 36 minutes over January. Sunrise moves from 7:24 AM to 7:15 AM, and sunset from 4:45 PM to 5:14 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.47:244:45
29.47:244:46
39.47:244:47
49.47:244:47
59.47:244:48
69.47:244:49
79.47:244:50
89.47:244:51
99.57:244:52
109.57:244:53
119.57:244:53
129.57:244:54
139.57:234:55
149.67:234:56
159.67:234:57
169.67:234:58
179.67:224:59
189.67:225:00
199.77:225:01
209.77:215:02
219.77:215:03
229.77:205:05
239.87:205:06
249.87:195:07
259.87:195:08
269.87:185:09
279.97:185:10
289.97:175:11
299.97:165:12
3010.07:155:13
3110.07:155:14

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 2.23 kWh/m².

For context, solar energy here swings from a low near 1.92 kWh/m² to a high of 6.45 kWh/m² in June across the year — January's 2.23 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.0Dim
22.0Dim
32.0Dim
42.0Dim
52.0Moderate
62.0Moderate
72.0Moderate
82.0Moderate
92.1Moderate
102.1Moderate
112.1Moderate
122.1Moderate
132.1Moderate
142.2Moderate
152.2Moderate
162.2Moderate
172.2Moderate
182.3Moderate
192.3Moderate
202.3Moderate
212.4Moderate
222.4Moderate
232.4Moderate
242.5Moderate
252.5Moderate
262.5Moderate
272.5Moderate
282.6Moderate
292.6Moderate
302.6Moderate
312.7Moderate
Planning a trip in January

Hazard calendar for Oakville

In seasonPeak

None of Oakville's seasonal hazards are active in January. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Oakville 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 January a good time to visit Oakville?

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

0.0
Sightseeing
12th-best month of the year
0.0
Beach & pool
10th-best month of the year

January is a weaker month for outdoor sightseeing in Oakville.

What to pack for Oakville in January

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

In January, Oakville sees daytime highs around 40°F and nights near 25°F. Pack a warm layer and a heavy coat. Worth having: rain gear. About 8 days see rain.

a warm layera heavy coatrain gear

UV index in Oakville in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 2. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Oakville peaks around June 22 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJun 22UV 9Dec 23UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar5High
Apr7High
May8Very high
Jun9Very high
Jul9Very high
Aug8Very high
Sep7High
Oct4Moderate
Nov3Moderate
Dec2Low

Air quality in Oakville in January

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Oakville is worst in July — around 18 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (October, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1418 µg/m³Oct 238 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb12Good
Mar12Good
Apr11Good
May14Moderate
Jun16Moderate
Jul18Moderate
Aug15Moderate
Sep12Moderate
Oct8Good
Nov8Good
Dec9Good
Location & terrain

Where is Oakville?

Oakville sits at 38.5°N, 90.3°W, 600 ft above sea level, in United States. The nearest listed city is Mehlville, 3.1 mi away.

Topography around Oakville

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

Within 2 miles, the terrain around Oakville has only modest variations in elevation — a maximum elevation change of 433 ft around an average of 502 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 692 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,322 ft.

The land around Oakville is covered by trees (51%) and artificial surfaces (21%) within 2 miles, trees (45%) and cropland (23%) within 10 miles, and trees (51%) and cropland (33%) within 50 miles.

2 miles
433 ft
10 miles
692 ft
50 miles
1,322 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
January weather nearby: Mehlville 3.1 mi · Lemay 4.3 mi · Arnold 5.0 mi · Concord 5.0 mi · Affton 5.6 mi · Webster Groves 8.7 mi · Kirkwood 9.3 mi · Clayton 12 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 Oakville (38.4701°, -90.3046°, elevation 600 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). 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).