Coos Bay weather in March

In March, Coos Bay sees average daytime highs of 53°F and overnight lows near 44°F, with 6.6 in of precipitation across 16.8 wet days and about 11.6 hours of daylight. It is the 9th-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 53°F through the month. The sky is clear or mostly clear about 16% of the time in March, and the air most often feels dry.

Daylight stretches from about 10 h 54 min at the start of March to 12 h 24 min by month's end. Set against the rest of the year, March is Coos Bay's 9th-clearest and 3rd-windiest month. For the whole year in context, see Coos Bay's year-round climate.

Daytime high: 53°; 9th warmest
Overnight low: 44°; 4th coldest
Precipitation: 6.6 in; 16.8 wet days
Daylight: 11 h 36 min; 6:38 AM – 6:15 PM
Cloud cover: 71%; 9th clearest
Wind: 9 mph; 3rd windiest
Solar energy: 3.48 kWh/m²
Travel score: 2.6; 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.

← February Coos Bay year-round climate April →Best places to visit in March

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

Temperature in March

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 53°F through the month.

A typical March day in Coos Bay reaches about 53°F in the afternoon and slips back to 44°F overnight — a 10°F spread between the day's warmth and the night's chill. On most days the high lands between 47°F and 60°F. Set against its neighbours, March runs on par with February and about 2°F cooler than April.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Avg high (°F)	52	53	53	53	53	53	53	53	53	53	53	53	53	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54
Avg low (°F)	43	43	43	43	43	43	43	43	43	44	44	44	44	44	44	44	44	44	44	44	44	44	44	44	44	44	44	44	44	44	44

	Avg high (°F)	Avg low (°F)
1	52	43
2	53	43
3	53	43
4	53	43
5	53	43
6	53	43
7	53	43
8	53	43
9	53	43
10	53	44
11	53	44
12	53	44
13	53	44
14	54	44
15	54	44
16	54	44
17	54	44
18	54	44
19	54	44
20	54	44
21	54	44
22	54	44
23	54	44
24	54	44
25	54	44
26	54	44
27	54	44
28	54	44
29	54	44
30	54	44
31	54	44

Coos Bay weather by month

How March compares with the rest of the year at a glance. March is the 9th-warmest and 4th-wettest month here — the current month is highlighted below.

Month	High / Low (°F)	Rainfall (inches)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	51° / 43°	8.1	17.3	0.4	9.2	2.1
Feb	52° / 43°	6.2	14.8	0.5	10.2	2.4
Mar	53° / 44°	6.6	16.8	0.4	11.6	2.6
Apr	56° / 45°	4.6	14.8	0.1	13.2	3.3
May	60° / 49°	2.5	9.5	0	14.5	4.8
Jun	63° / 52°	1.3	5.9	0	15.2	6.3
Jul	67° / 54°	0.2	1.4	0	14.9	8.0
Aug	68° / 55°	0.4	1.9	0	13.8	8.0
Sep	67° / 53°	1.1	4.2	0	12.3	7.4
Oct	61° / 50°	3.5	9.4	0	10.8	5.4
Nov	55° / 46°	7.6	16.8	0.1	9.5	2.9
Dec	51° / 43°	9.5	17.6	0.2	8.8	2.0

Cloud cover in March

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 16% of the time in March.

Beyond those clear spells, partly cloudy skies cover about 13% of March, with mostly cloudy or overcast conditions the remaining 71%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Clearer (%)	30	30	30	30	30	28	28	28	29	28	28	28	28	28	28	29	28	27	29	29	29	29	29	29	31	31	31	31	31	31	30
Cloudier (%)	70	70	70	70	70	72	72	72	71	72	72	72	72	72	72	71	72	73	71	71	71	71	71	71	69	69	69	69	69	69	70

	Clearer (%)	Cloudier (%)
1	30	70
2	30	70
3	30	70
4	30	70
5	30	70
6	28	72
7	28	72
8	28	72
9	29	71
10	28	72
11	28	72
12	28	72
13	28	72
14	28	72
15	28	72
16	29	71
17	28	72
18	27	73
19	29	71
20	29	71
21	29	71
22	29	71
23	29	71
24	29	71
25	31	69
26	31	69
27	31	69
28	31	69
29	31	69
30	31	69
31	30	70

Chance of precipitation in March

Any precipitationSnow

Coos Bay gets around 6.6 in of rain and snow over 16.8 wet days in March. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 54% and peaks near 55% on the wettest days, and about 0 day brings snow.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Rain chance (%)	55	55	55	55	55	55	54	54	54	54	54	53	53	53	54	54	54	54	54	54	54	54	53	53	53	53	53	53	53	53	53
Snow chance (%)	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	1	1	1	1	1	1	1	1	1	1	0	0

	Rain chance (%)	Snow chance (%)
1	55	2
2	55	2
3	55	2
4	55	2
5	55	2
6	55	2
7	54	2
8	54	2
9	54	2
10	54	2
11	54	2
12	53	2
13	53	2
14	53	2
15	54	2
16	54	2
17	54	2
18	54	2
19	54	2
20	54	1
21	54	1
22	54	1
23	53	1
24	53	1
25	53	1
26	53	1
27	53	1
28	53	1
29	53	1
30	53	0
31	53	0

Humidity in March

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, March lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Dry (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

Wind in March

Winds average 9 mph in March.

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

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Wind speed (mph)	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9
Feels	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze

	Wind speed (mph)	Feels
1	9	light breeze
2	9	light breeze
3	9	light breeze
4	9	light breeze
5	9	light breeze
6	9	light breeze
7	9	light breeze
8	9	light breeze
9	9	light breeze
10	9	light breeze
11	9	light breeze
12	9	light breeze
13	9	light breeze
14	9	light breeze
15	9	light breeze
16	9	light breeze
17	9	light breeze
18	9	light breeze
19	9	light breeze
20	9	light breeze
21	9	light breeze
22	9	light breeze
23	9	light breeze
24	9	light breeze
25	9	light breeze
26	9	light breeze
27	9	light breeze
28	9	light breeze
29	9	light breeze
30	9	light breeze
31	9	light breeze

Sunrise & sunset in March

DaylightNight

Daylight runs from about 10 h 54 min at the start of March to 12 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 90 minutes over March. Sunrise moves from 7:04 AM to 6:10 AM, and sunset from 5:57 PM to 6:34 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Daylight (h)	10.9	10.9	11.0	11.0	11.1	11.1	11.2	11.2	11.3	11.3	11.4	11.4	11.5	11.5	11.6	11.6	11.7	11.7	11.8	11.8	11.9	11.9	12.0	12.0	12.1	12.1	12.2	12.2	12.3	12.3	12.4
Sunrise (AM)	7:04	7:02	7:00	6:59	6:57	6:55	6:53	6:52	6:50	6:48	6:47	6:45	6:43	6:41	6:39	6:38	6:36	6:34	6:32	6:30	6:28	6:27	6:25	6:23	6:21	6:19	6:17	6:16	6:14	6:12	6:10
Sunset (PM)	5:57	5:58	5:59	6:00	6:02	6:03	6:04	6:06	6:07	6:08	6:09	6:11	6:12	6:13	6:14	6:15	6:17	6:18	6:19	6:20	6:22	6:23	6:24	6:25	6:26	6:28	6:29	6:30	6:31	6:32	6:34

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	10.9	7:04	5:57
2	10.9	7:02	5:58
3	11.0	7:00	5:59
4	11.0	6:59	6:00
5	11.1	6:57	6:02
6	11.1	6:55	6:03
7	11.2	6:53	6:04
8	11.2	6:52	6:06
9	11.3	6:50	6:07
10	11.3	6:48	6:08
11	11.4	6:47	6:09
12	11.4	6:45	6:11
13	11.5	6:43	6:12
14	11.5	6:41	6:13
15	11.6	6:39	6:14
16	11.6	6:38	6:15
17	11.7	6:36	6:17
18	11.7	6:34	6:18
19	11.8	6:32	6:19
20	11.8	6:30	6:20
21	11.9	6:28	6:22
22	11.9	6:27	6:23
23	12.0	6:25	6:24
24	12.0	6:23	6:25
25	12.1	6:21	6:26
26	12.1	6:19	6:28
27	12.2	6:17	6:29
28	12.2	6:16	6:30
29	12.3	6:14	6:31
30	12.3	6:12	6:32
31	12.4	6:10	6:34

Solar energy in March

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in March, about 3.48 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 — March's 3.48 kWh/m² falls in the middle.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Solar energy (kWh/m²)	2.9	2.9	3.0	3.0	3.0	3.1	3.1	3.2	3.2	3.2	3.3	3.3	3.4	3.4	3.5	3.5	3.5	3.6	3.6	3.7	3.7	3.8	3.8	3.8	3.9	3.9	4.0	4.0	4.1	4.1	4.1
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	2.9	Moderate
2	2.9	Moderate
3	3.0	Moderate
4	3.0	Moderate
5	3.0	Moderate
6	3.1	Moderate
7	3.1	Moderate
8	3.2	Moderate
9	3.2	Moderate
10	3.2	Moderate
11	3.3	Moderate
12	3.3	Moderate
13	3.4	Moderate
14	3.4	Moderate
15	3.5	Moderate
16	3.5	Moderate
17	3.5	Moderate
18	3.6	Moderate
19	3.6	Moderate
20	3.7	Moderate
21	3.7	Moderate
22	3.8	Moderate
23	3.8	Moderate
24	3.8	Moderate
25	3.9	Moderate
26	3.9	Moderate
27	4.0	Moderate
28	4.0	Bright
29	4.1	Bright
30	4.1	Bright
31	4.1	Bright

Planning a trip in March

Hazard calendar for Coos Bay

In seasonPeak

In March, 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 March a good time to visit Coos Bay?

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

2.6

Sightseeing

9th-best month of the year

0.0

Beach & pool

9th-best month of the year

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

What to pack for Coos Bay in March

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

In March, Coos Bay sees daytime highs around 53°F and nights near 44°F. Pack a warm layer and rain gear. About 17 days see rain.

a warm layerrain gear

Sea temperature near Coos Bay in March

The nearest coast averages about 51°F in March — 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.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°F)	51	51	51	52	53	55	55	56	56	55	53	52
Comfort	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing

	Sea temperature (°F)	Comfort
Jan	51	Bracing
Feb	51	Bracing
Mar	51	Bracing
Apr	52	Bracing
May	53	Bracing
Jun	55	Bracing
Jul	55	Bracing
Aug	56	Bracing
Sep	56	Bracing
Oct	55	Bracing
Nov	53	Bracing
Dec	52	Bracing

UV index in Coos Bay in March

LowModerateHighVery highExtreme

Clear-sky midday UV in March 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 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.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	2	2	4	5	9	8	9	7	5	4	2	1
Level	Low	Moderate	Moderate	High	Very high	Very high	Very high	Very high	Moderate	Moderate	Low	Low

	UV index (midday)	Level
Jan	2	Low
Feb	2	Moderate
Mar	4	Moderate
Apr	5	High
May	9	Very high
Jun	8	Very high
Jul	9	Very high
Aug	7	Very high
Sep	5	Moderate
Oct	4	Moderate
Nov	2	Low
Dec	1	Low

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

trees 54%

10 miles

1,742 ft

trees 65%

50 miles

4,088 ft

trees 64%

treesgrasslandartificial surfacesbare terrainwaterwetland

← February Coos Bay year-round climate April →Best places to visit in March

March 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

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).

	Avg high (°F)	Avg low (°F)
1	52	43
2	53	43
3	53	43
4	53	43
5	53	43
6	53	43
7	53	43
8	53	43
9	53	43
10	53	44
11	53	44
12	53	44
13	53	44
14	54	44
15	54	44
16	54	44
17	54	44
18	54	44
19	54	44
20	54	44
21	54	44
22	54	44
23	54	44
24	54	44
25	54	44
26	54	44
27	54	44
28	54	44
29	54	44
30	54	44
31	54	44

	Clearer (%)	Cloudier (%)
1	30	70
2	30	70
3	30	70
4	30	70
5	30	70
6	28	72
7	28	72
8	28	72
9	29	71
10	28	72
11	28	72
12	28	72
13	28	72
14	28	72
15	28	72
16	29	71
17	28	72
18	27	73
19	29	71
20	29	71
21	29	71
22	29	71
23	29	71
24	29	71
25	31	69
26	31	69
27	31	69
28	31	69
29	31	69
30	31	69
31	30	70

	Rain chance (%)	Snow chance (%)
1	55	2
2	55	2
3	55	2
4	55	2
5	55	2
6	55	2
7	54	2
8	54	2
9	54	2
10	54	2
11	54	2
12	53	2
13	53	2
14	53	2
15	54	2
16	54	2
17	54	2
18	54	2
19	54	2
20	54	1
21	54	1
22	54	1
23	53	1
24	53	1
25	53	1
26	53	1
27	53	1
28	53	1
29	53	1
30	53	0
31	53	0

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

	Avg high (°F)	Avg low (°F)
1	52	43
2	53	43
3	53	43
4	53	43
5	53	43
6	53	43
7	53	43
8	53	43
9	53	43
10	53	44
11	53	44
12	53	44
13	53	44
14	54	44
15	54	44
16	54	44
17	54	44
18	54	44
19	54	44
20	54	44
21	54	44
22	54	44
23	54	44
24	54	44
25	54	44
26	54	44
27	54	44
28	54	44
29	54	44
30	54	44
31	54	44

	Clearer (%)	Cloudier (%)
1	30	70
2	30	70
3	30	70
4	30	70
5	30	70
6	28	72
7	28	72
8	28	72
9	29	71
10	28	72
11	28	72
12	28	72
13	28	72
14	28	72
15	28	72
16	29	71
17	28	72
18	27	73
19	29	71
20	29	71
21	29	71
22	29	71
23	29	71
24	29	71
25	31	69
26	31	69
27	31	69
28	31	69
29	31	69
30	31	69
31	30	70

	Rain chance (%)	Snow chance (%)
1	55	2
2	55	2
3	55	2
4	55	2
5	55	2
6	55	2
7	54	2
8	54	2
9	54	2
10	54	2
11	54	2
12	53	2
13	53	2
14	53	2
15	54	2
16	54	2
17	54	2
18	54	2
19	54	2
20	54	1
21	54	1
22	54	1
23	53	1
24	53	1
25	53	1
26	53	1
27	53	1
28	53	1
29	53	1
30	53	0
31	53	0

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

	Avg high (°F)	Avg low (°F)
1	52	43
2	53	43
3	53	43
4	53	43
5	53	43
6	53	43
7	53	43
8	53	43
9	53	43
10	53	44
11	53	44
12	53	44
13	53	44
14	54	44
15	54	44
16	54	44
17	54	44
18	54	44
19	54	44
20	54	44
21	54	44
22	54	44
23	54	44
24	54	44
25	54	44
26	54	44
27	54	44
28	54	44
29	54	44
30	54	44
31	54	44

	Clearer (%)	Cloudier (%)
1	30	70
2	30	70
3	30	70
4	30	70
5	30	70
6	28	72
7	28	72
8	28	72
9	29	71
10	28	72
11	28	72
12	28	72
13	28	72
14	28	72
15	28	72
16	29	71
17	28	72
18	27	73
19	29	71
20	29	71
21	29	71
22	29	71
23	29	71
24	29	71
25	31	69
26	31	69
27	31	69
28	31	69
29	31	69
30	31	69
31	30	70

	Rain chance (%)	Snow chance (%)
1	55	2
2	55	2
3	55	2
4	55	2
5	55	2
6	55	2
7	54	2
8	54	2
9	54	2
10	54	2
11	54	2
12	53	2
13	53	2
14	53	2
15	54	2
16	54	2
17	54	2
18	54	2
19	54	2
20	54	1
21	54	1
22	54	1
23	53	1
24	53	1
25	53	1
26	53	1
27	53	1
28	53	1
29	53	1
30	53	0
31	53	0

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100