Coos Bay weather in January

In January, Coos Bay sees average daytime highs of 51°F and overnight lows near 43°F, with 8.1 in of precipitation across 17.3 wet days and about 9.2 hours of daylight. It is the 11th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 51°F through the month. The sky is clear or mostly clear about 18% of the time in January, and the air most often feels dry.

Daylight stretches from about 8 h 48 min at the start of January to 9 h 36 min by month's end. Set against the rest of the year, January is Coos Bay's 11th-clearest and 2nd-windiest month. For the whole year in context, see Coos Bay's year-round climate.

Daytime high
51°
11th warmest
Overnight low
43°
3rd coldest
Precipitation
8.1 in
17.3 wet days
Daylight
9 h 06 min
7:53 AM – 5:00 PM
Cloud cover
72%
11th clearest
Wind
10 mph
2nd windiest
Solar energy
1.54 kWh/m²
Travel score
2.1
out of 10

Coos Bay is city in Coos County, Oregon, United States.

Density
393/km²
people per km²
Founded
1853

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 51°F through the month.

A typical January day in Coos Bay reaches about 51°F in the afternoon and slips back to 43°F overnight — a 8°F spread between the day's warmth and the night's chill. On most days the high lands between 45°F and 57°F. Set against its neighbours, January runs on par with December and on par with February.

30°40°50°60°151015202531
Avg high (°F)Avg low (°F)
15142
25142
35142
45142
55143
65143
75143
85143
95143
105143
115143
125143
135143
145143
155143
165143
175143
185143
195143
205243
215243
225243
235243
245243
255243
265243
275243
285243
295243
305243
315243

Coos Bay weather by month

How January compares with the rest of the year at a glance. January is the 11th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan51° / 43°8.117.30.49.22.1
Feb52° / 43°6.214.80.510.22.4
Mar53° / 44°6.616.80.411.62.6
Apr56° / 45°4.614.80.113.23.3
May60° / 49°2.59.5014.54.8
Jun63° / 52°1.35.9015.26.3
Jul67° / 54°0.21.4014.98.0
Aug68° / 55°0.41.9013.88.0
Sep67° / 53°1.14.2012.37.4
Oct61° / 50°3.59.4010.85.4
Nov55° / 46°7.616.80.19.52.9
Dec51° / 43°9.517.60.28.82.0

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 18% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 10% of January, with mostly cloudy or overcast conditions the remaining 72%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12773
22674
32476
42476
52476
62575
72674
82674
92674
102674
112773
122773
132773
142971
152971
163070
173169
183169
193169
203169
213169
223268
233169
243169
253169
263070
273070
282872
292872
302872
312872

Chance of precipitation in January

Any precipitationSnow

Coos Bay gets around 8.1 in of rain and snow over 17.3 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 55% and peaks near 59% on the wettest days, and about 0 day brings snow. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
1561
2571
3572
4582
5582
6582
7592
8592
9592
10592
11592
12591
13581
14581
15571
16561
17561
18551
19541
20541
21531
22531
23531
24521
25521
26521
27521
28511
29511
30511
31501

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 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100
31100

Wind in January

Winds average 10 mph in January.

Across January, daily wind ranges from about 9 mph on the calmest days to 10 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
110light breeze
210light breeze
310light breeze
410light breeze
510light breeze
610light breeze
710light breeze
810light breeze
910light breeze
1010light breeze
1110light breeze
1210light breeze
1310light breeze
1410light breeze
1510light breeze
1610light breeze
1710light breeze
1810light breeze
1910light breeze
2010light breeze
2110light breeze
2210light breeze
2310light breeze
2410light breeze
2510light breeze
2610light breeze
279light breeze
289light breeze
299light breeze
309light breeze
319light breeze

Sunrise & sunset in January

DaylightNight

Daylight runs from about 8 h 48 min at the start of January to 9 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 48 minutes over January. Sunrise moves from 7:55 AM to 7:42 AM, and sunset from 4:45 PM to 5:18 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
18.87:554:45
28.87:554:46
38.97:554:47
48.97:554:48
58.97:554:48
68.97:554:49
78.97:554:50
88.97:554:51
99.07:554:52
109.07:554:53
119.07:544:54
129.07:544:55
139.07:544:56
149.17:534:57
159.17:534:59
169.17:535:00
179.17:525:01
189.27:525:02
199.27:515:03
209.27:515:04
219.37:505:06
229.37:495:07
239.37:495:08
249.47:485:09
259.47:475:11
269.47:465:12
279.57:465:13
289.57:455:14
299.57:445:16
309.67:435:17
319.67:425:18

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 1.54 kWh/m².

For context, solar energy here swings from a low near 1.32 kWh/m² to a high of 7.22 kWh/m² in July across the year — January's 1.54 kWh/m² sits near the bottom.

00.511.522.5151015202531
Solar energy (kWh/m²)Level
11.4Dim
21.4Dim
31.4Dim
41.4Dim
51.4Dim
61.4Dim
71.4Dim
81.4Dim
91.4Dim
101.4Dim
111.4Dim
121.5Dim
131.5Dim
141.5Dim
151.5Dim
161.5Dim
171.6Dim
181.6Dim
191.6Dim
201.6Dim
211.7Dim
221.7Dim
231.7Dim
241.7Dim
251.8Dim
261.8Dim
271.8Dim
281.8Dim
291.9Dim
301.9Dim
311.9Dim
Planning a trip in January

Hazard calendar for Coos Bay

In seasonPeak

In January, Coos Bay sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Coos Bay's rainy season runs November–April, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is January a good time to visit Coos Bay?

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

2.1
Sightseeing
11th-best month of the year
0.0
Beach & pool
9th-best month of the year

January is a weaker month for outdoor sightseeing in Coos Bay.

What to pack for Coos Bay in January

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

In January, Coos Bay sees daytime highs around 51°F and nights near 43°F. Pack a warm layer and rain gear. About 17 days see rain.

a warm layerrain gear

Sea temperature near Coos Bay in January

The nearest coast averages about 51°F in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 8 mi away) is warmest in September at about 56°F and coldest in February near 51°F.

The water stays below 68°F all year — cool enough that most swimmers want a wetsuit.

50°52°54°56°58°JanFebMarAprMayJunJulAugSepOctNovDecbracing
Sea temperature (°F)Comfort
Jan51Bracing
Feb51Bracing
Mar51Bracing
Apr52Bracing
May53Bracing
Jun55Bracing
Jul55Bracing
Aug56Bracing
Sep56Bracing
Oct55Bracing
Nov53Bracing
Dec52Bracing

UV index in Coos Bay 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 Coos Bay peaks around July 15 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 15UV 8Dec 17UV 1
UV index (midday)Level
Jan2Low
Feb2Moderate
Mar4Moderate
Apr5High
May9Very high
Jun8Very high
Jul9Very high
Aug7Very high
Sep5Moderate
Oct4Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Coos Bay?

Coos Bay sits at 43.4°N, 124.2°W, 23 ft above sea level, in United States. The nearest listed city is Roseburg, 45 mi away.

Topography around Coos Bay

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

Within 2 miles, the terrain around Coos Bay has only modest variations in elevation — a maximum elevation change of 600 ft around an average of 112 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,742 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 4,088 ft.

The land around Coos Bay is covered by trees (54%) and water (20%) within 2 miles, trees (65%) and water (23%) within 10 miles, and trees (64%) and water (27%) within 50 miles.

2 miles
600 ft
10 miles
1,742 ft
50 miles
4,088 ft
treesgrasslandartificial surfacesbare terrainwaterwetland
January weather nearby: Roseburg 45 mi · Eugene 74 mi · Springfield 76 mi · Grants Pass 78 mi · Central Point 95 mi · Corvallis 96 mi · Medford 99 mi · Albany 104 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 Coos Bay (43.3665°, -124.2179°, elevation 23 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. 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).