Roseburg weather in September

In September, Roseburg sees average daytime highs of 76°F and overnight lows near 50°F, with 1.2 in of rain across 4.7 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 79°F in the first days to 72°F by the end. The sky is clear or mostly clear about 60% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 hours at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Roseburg's 3rd-clearest and 11th-windiest month. For the whole year in context, see Roseburg's year-round climate.

Daytime high: 76°; 3rd warmest
Overnight low: 50°; 10th coldest
Rainfall: 1.2 in; 4.7 wet days
Daylight: 12 h 18 min; 5:59 AM – 6:16 PM
Cloud cover: 33%; 3rd clearest
Wind: 4 mph; 11th windiest
Solar energy: 5.02 kWh/m²
Travel score: 8.1; out of 10

Roseburg is city in and seat of Douglas County, Oregon, United States.

Density: 837/km²; people per km²
Founded: 1851

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

← August Roseburg year-round climate October →Best places to visit in September

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 79°F in the first days to 72°F by the end.

A typical September day in Roseburg reaches about 76°F in the afternoon and slips back to 50°F overnight — a 26°F spread between the day's warmth and the night's chill. On most days the high lands between 64°F and 88°F. Set against its neighbours, September runs about 6°F cooler than August and about 11°F warmer than October.

	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
Avg high (°F)	80	79	79	79	79	79	78	78	78	78	77	77	77	76	76	76	76	75	75	75	75	74	74	74	73	73	73	72	72	71
Avg low (°F)	52	52	52	52	52	51	51	51	51	51	51	51	51	50	50	50	50	50	49	49	49	49	49	48	48	48	48	47	47	47

	Avg high (°F)	Avg low (°F)
1	80	52
2	79	52
3	79	52
4	79	52
5	79	52
6	79	51
7	78	51
8	78	51
9	78	51
10	78	51
11	77	51
12	77	51
13	77	51
14	76	50
15	76	50
16	76	50
17	76	50
18	75	50
19	75	49
20	75	49
21	75	49
22	74	49
23	74	49
24	74	48
25	73	48
26	73	48
27	73	48
28	72	47
29	72	47
30	71	47

How September really feels in Roseburg

Once humidity and wind are folded in, September 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

heat index over the day's high

Days feeling ≤ 32°F

wind chill below the day's low

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

Roseburg weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 10th-wettest month here — the current month is highlighted below.

Month	High / Low (°F)	Rainfall (inches)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	48° / 34°	6.2	16.1	3.4	9.2	1.5
Feb	51° / 35°	4.9	14.5	3.2	10.2	2.2
Mar	55° / 37°	5.8	16.6	3	11.6	3.0
Apr	59° / 40°	4.6	15.4	1.4	13.2	4.0
May	66° / 45°	3.1	10.6	0	14.4	5.9
Jun	72° / 49°	1.6	6.9	0	15.1	7.3
Jul	81° / 54°	0.3	1.6	0	14.9	8.1
Aug	82° / 54°	0.4	2	0	13.8	8.0
Sep	76° / 50°	1.2	4.7	0	12.3	8.1
Oct	65° / 43°	3.4	9.9	0	10.8	6.0
Nov	53° / 38°	6.3	15.9	1.4	9.5	2.5
Dec	47° / 34°	7.8	16.8	3.4	8.9	1.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 60% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 26%. Skies tend to cloud over as the month goes on.

	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
Clearer (%)	82	82	82	81	81	80	79	78	76	75	74	73	72	72	71	70	71	70	70	71	71	71	71	71	71	71	70	70	70	69
Cloudier (%)	18	18	18	19	19	20	21	22	24	25	26	27	28	28	29	30	29	30	30	29	29	29	29	29	29	29	30	30	30	31

	Clearer (%)	Cloudier (%)
1	82	18
2	82	18
3	82	18
4	81	19
5	81	19
6	80	20
7	79	21
8	78	22
9	76	24
10	75	25
11	74	26
12	73	27
13	72	28
14	72	28
15	71	29
16	70	30
17	71	29
18	70	30
19	70	30
20	71	29
21	71	29
22	71	29
23	71	29
24	71	29
25	71	29
26	71	29
27	70	30
28	70	30
29	70	30
30	69	31

Chance of precipitation in September

Any precipitation

Roseburg gets around 1.2 in of rain over 4.7 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 16% and peaks near 23% on the wettest days. The odds climb toward the end of the month.

	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
Rain chance (%)	10	10	10	10	10	10	11	11	12	13	14	14	15	16	16	17	17	18	18	19	20	20	21	21	21	22	22	23	23	23

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

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 93% 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
Dry (%)	91	91	92	92	92	92	92	92	92	92	92	92	92	92	93	93	93	93	93	94	94	94	95	95	95	95	96	96	96	96
Comfortable (%)	9	9	8	8	8	8	8	8	8	8	8	8	8	8	7	7	7	7	7	6	6	6	5	5	5	5	4	4	4	4

	Dry (%)	Comfortable (%)
1	91	9
2	91	9
3	92	8
4	92	8
5	92	8
6	92	8
7	92	8
8	92	8
9	92	8
10	92	8
11	92	8
12	92	8
13	92	8
14	92	8
15	93	7
16	93	7
17	93	7
18	93	7
19	93	7
20	94	6
21	94	6
22	94	6
23	95	5
24	95	5
25	95	5
26	95	5
27	96	4
28	96	4
29	96	4
30	96	4

Wind in September

Winds average 4 mph in September.

Across September, daily wind ranges from about 3 mph on the calmest days to 4 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
Wind speed (mph)	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	3	3	3	3	3	3	3	3
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

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

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 hours at the start of September to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 84 minutes over September. Sunrise moves from 5:42 AM to 6:15 AM, and sunset from 6:44 PM to 5:50 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
Daylight (h)	13.0	13.0	12.9	12.9	12.8	12.8	12.7	12.7	12.6	12.6	12.5	12.5	12.4	12.4	12.3	12.3	12.2	12.2	12.1	12.1	12.0	12.0	11.9	11.9	11.8	11.8	11.7	11.7	11.6	11.6
Sunrise (AM)	5:42	5:43	5:44	5:45	5:46	5:48	5:49	5:50	5:51	5:52	5:53	5:54	5:56	5:57	5:58	5:59	6:00	6:01	6:02	6:04	6:05	6:06	6:07	6:08	6:09	6:10	6:12	6:13	6:14	6:15
Sunset (PM)	6:44	6:42	6:41	6:39	6:37	6:35	6:33	6:31	6:30	6:28	6:26	6:24	6:22	6:20	6:18	6:16	6:15	6:13	6:11	6:09	6:07	6:05	6:03	6:01	5:59	5:58	5:56	5:54	5:52	5:50

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	13.0	5:42	6:44
2	13.0	5:43	6:42
3	12.9	5:44	6:41
4	12.9	5:45	6:39
5	12.8	5:46	6:37
6	12.8	5:48	6:35
7	12.7	5:49	6:33
8	12.7	5:50	6:31
9	12.6	5:51	6:30
10	12.6	5:52	6:28
11	12.5	5:53	6:26
12	12.5	5:54	6:24
13	12.4	5:56	6:22
14	12.4	5:57	6:20
15	12.3	5:58	6:18
16	12.3	5:59	6:16
17	12.2	6:00	6:15
18	12.2	6:01	6:13
19	12.1	6:02	6:11
20	12.1	6:04	6:09
21	12.0	6:05	6:07
22	12.0	6:06	6:05
23	11.9	6:07	6:03
24	11.9	6:08	6:01
25	11.8	6:09	5:59
26	11.8	6:10	5:58
27	11.7	6:12	5:56
28	11.7	6:13	5:54
29	11.6	6:14	5:52
30	11.6	6:15	5:50

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.02 kWh/m².

For context, solar energy here swings from a low near 1.34 kWh/m² to a high of 7.46 kWh/m² in July across the year — September's 5.02 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
Solar energy (kWh/m²)	5.8	5.8	5.7	5.7	5.6	5.6	5.5	5.4	5.4	5.3	5.3	5.2	5.1	5.1	5.0	4.9	4.9	4.8	4.8	4.7	4.7	4.6	4.5	4.5	4.4	4.4	4.3	4.3	4.2	4.1
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	5.8	Bright
2	5.8	Bright
3	5.7	Bright
4	5.7	Bright
5	5.6	Bright
6	5.6	Bright
7	5.5	Bright
8	5.4	Bright
9	5.4	Bright
10	5.3	Bright
11	5.3	Bright
12	5.2	Bright
13	5.1	Bright
14	5.1	Bright
15	5.0	Bright
16	4.9	Bright
17	4.9	Bright
18	4.8	Bright
19	4.8	Bright
20	4.7	Bright
21	4.7	Bright
22	4.6	Bright
23	4.5	Bright
24	4.5	Bright
25	4.4	Bright
26	4.4	Bright
27	4.3	Bright
28	4.3	Bright
29	4.2	Bright
30	4.1	Bright

Planning a trip in September

Hazard calendar for Roseburg

In seasonPeak

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

Roseburg'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 September a good time to visit Roseburg?

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

8.1

Sightseeing

1st-best month of the year

6.9

Beach & pool

3rd-best month of the year

September is one of the better times to visit Roseburg for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Roseburg in September

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

In September, Roseburg sees daytime highs around 76°F and nights near 50°F. Worth packing: light clothes and sun protection. About 5 days see rain.

light clothessun protection

UV index in Roseburg in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Roseburg peaks around July 15 at about 9 (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	5	6	9	8	9	7	5	4	2	1
Level	Low	Moderate	Moderate	High	Very high	Very high	Very high	Very high	High	Moderate	Low	Low

	UV index (midday)	Level
Jan	2	Low
Feb	2	Moderate
Mar	5	Moderate
Apr	6	High
May	9	Very high
Jun	8	Very high
Jul	9	Very high
Aug	7	Very high
Sep	5	High
Oct	4	Moderate
Nov	2	Low
Dec	1	Low

Air quality in Roseburg in September

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Roseburg is worst in September — around 73 µg/m³ PM2.5 (unhealthy), about 16.1× the cleanest month (January, 5 µg/m³).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	5	6	8	9	9	7	13	31	73	11	13	13
Level	Good	Good	Good	Good	Good	Good	Moderate	Moderate	Unhealthy	Good	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	5	Good
Feb	6	Good
Mar	8	Good
Apr	9	Good
May	9	Good
Jun	7	Good
Jul	13	Moderate
Aug	31	Moderate
Sep	73	Unhealthy
Oct	11	Good
Nov	13	Moderate
Dec	13	Moderate

Location & terrain

Where is Roseburg?

Roseburg sits at 43.2°N, 123.3°W, 482 ft above sea level, in United States. The nearest listed city is Coos Bay, 45 mi away.

Topography around Roseburg

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

Within 2 miles, the terrain around Roseburg has significant variations in elevation — a maximum elevation change of 1,060 ft around an average of 673 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 2,858 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 6,706 ft.

The land around Roseburg is covered by trees (54%) and artificial surfaces (25%) within 2 miles, trees (55%) and grassland (39%) within 10 miles, and trees (90%) within 50 miles.

2 miles

1,060 ft

trees 54%

10 miles

2,858 ft

trees 55%

50 miles

6,706 ft

trees 90%

treesgrasslandcroplandartificial surfacesbare terrainwater

← August Roseburg year-round climate October →Best places to visit in September

September weather nearby: Coos Bay 45 mi · Grants Pass 53 mi · Eugene 59 mi · Springfield 60 mi · Central Point 62 mi · Medford 66 mi · Ashland 78 mi · Corvallis 93 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 Roseburg (43.2165°, -123.3417°, elevation 482 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. 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).

	Avg high (°F)	Avg low (°F)
1	80	52
2	79	52
3	79	52
4	79	52
5	79	52
6	79	51
7	78	51
8	78	51
9	78	51
10	78	51
11	77	51
12	77	51
13	77	51
14	76	50
15	76	50
16	76	50
17	76	50
18	75	50
19	75	49
20	75	49
21	75	49
22	74	49
23	74	49
24	74	48
25	73	48
26	73	48
27	73	48
28	72	47
29	72	47
30	71	47

	Clearer (%)	Cloudier (%)
1	82	18
2	82	18
3	82	18
4	81	19
5	81	19
6	80	20
7	79	21
8	78	22
9	76	24
10	75	25
11	74	26
12	73	27
13	72	28
14	72	28
15	71	29
16	70	30
17	71	29
18	70	30
19	70	30
20	71	29
21	71	29
22	71	29
23	71	29
24	71	29
25	71	29
26	71	29
27	70	30
28	70	30
29	70	30
30	69	31

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

	Dry (%)	Comfortable (%)
1	91	9
2	91	9
3	92	8
4	92	8
5	92	8
6	92	8
7	92	8
8	92	8
9	92	8
10	92	8
11	92	8
12	92	8
13	92	8
14	92	8
15	93	7
16	93	7
17	93	7
18	93	7
19	93	7
20	94	6
21	94	6
22	94	6
23	95	5
24	95	5
25	95	5
26	95	5
27	96	4
28	96	4
29	96	4
30	96	4

	Avg high (°F)	Avg low (°F)
1	80	52
2	79	52
3	79	52
4	79	52
5	79	52
6	79	51
7	78	51
8	78	51
9	78	51
10	78	51
11	77	51
12	77	51
13	77	51
14	76	50
15	76	50
16	76	50
17	76	50
18	75	50
19	75	49
20	75	49
21	75	49
22	74	49
23	74	49
24	74	48
25	73	48
26	73	48
27	73	48
28	72	47
29	72	47
30	71	47

	Clearer (%)	Cloudier (%)
1	82	18
2	82	18
3	82	18
4	81	19
5	81	19
6	80	20
7	79	21
8	78	22
9	76	24
10	75	25
11	74	26
12	73	27
13	72	28
14	72	28
15	71	29
16	70	30
17	71	29
18	70	30
19	70	30
20	71	29
21	71	29
22	71	29
23	71	29
24	71	29
25	71	29
26	71	29
27	70	30
28	70	30
29	70	30
30	69	31

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

	Dry (%)	Comfortable (%)
1	91	9
2	91	9
3	92	8
4	92	8
5	92	8
6	92	8
7	92	8
8	92	8
9	92	8
10	92	8
11	92	8
12	92	8
13	92	8
14	92	8
15	93	7
16	93	7
17	93	7
18	93	7
19	93	7
20	94	6
21	94	6
22	94	6
23	95	5
24	95	5
25	95	5
26	95	5
27	96	4
28	96	4
29	96	4
30	96	4

	Avg high (°F)	Avg low (°F)
1	80	52
2	79	52
3	79	52
4	79	52
5	79	52
6	79	51
7	78	51
8	78	51
9	78	51
10	78	51
11	77	51
12	77	51
13	77	51
14	76	50
15	76	50
16	76	50
17	76	50
18	75	50
19	75	49
20	75	49
21	75	49
22	74	49
23	74	49
24	74	48
25	73	48
26	73	48
27	73	48
28	72	47
29	72	47
30	71	47

	Clearer (%)	Cloudier (%)
1	82	18
2	82	18
3	82	18
4	81	19
5	81	19
6	80	20
7	79	21
8	78	22
9	76	24
10	75	25
11	74	26
12	73	27
13	72	28
14	72	28
15	71	29
16	70	30
17	71	29
18	70	30
19	70	30
20	71	29
21	71	29
22	71	29
23	71	29
24	71	29
25	71	29
26	71	29
27	70	30
28	70	30
29	70	30
30	69	31

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

	Dry (%)	Comfortable (%)
1	91	9
2	91	9
3	92	8
4	92	8
5	92	8
6	92	8
7	92	8
8	92	8
9	92	8
10	92	8
11	92	8
12	92	8
13	92	8
14	92	8
15	93	7
16	93	7
17	93	7
18	93	7
19	93	7
20	94	6
21	94	6
22	94	6
23	95	5
24	95	5
25	95	5
26	95	5
27	96	4
28	96	4
29	96	4
30	96	4