Montrose weather in September

In September, Montrose sees average daytime highs of 75°F and overnight lows near 46°F, with 1.1 in of precipitation across 5.9 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 80°F in the first days to 71°F by the end. The sky is clear or mostly clear about 62% of the time in September, and the air most often feels dry.

Daylight stretches from about 12 h 54 min at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Montrose's 1st-clearest and 5th-windiest month. For the whole year in context, see Montrose's year-round climate.

Daytime high: 75°; 4th warmest
Overnight low: 46°; 9th coldest
Precipitation: 1.1 in; 5.9 wet days
Daylight: 12 h 12 min; 5:58 AM – 6:13 PM
Cloud cover: 34%; 1st clearest
Wind: 4 mph; 5th windiest
Solar energy: 5.8 kWh/m²
Travel score: 7.8; out of 10

Montrose is city in and seat of Montrose County, Colorado, United States.

Density: 412/km²; people per km²
Founded: 1882

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

← August Montrose 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 80°F in the first days to 71°F by the end.

A typical September day in Montrose reaches about 75°F in the afternoon and slips back to 46°F overnight — a 29°F spread between the day's warmth and the night's chill. On most days the high lands between 66°F and 83°F. Set against its neighbours, September runs about 8°F cooler than August and about 13°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)	81	80	80	80	79	79	78	78	78	77	77	76	76	76	75	75	75	74	74	74	73	73	73	73	72	72	71	71	71	70
Avg low (°F)	51	51	51	51	50	50	49	49	49	48	48	47	47	47	46	46	45	45	45	44	44	43	43	43	42	42	42	41	41	40

	Avg high (°F)	Avg low (°F)
1	81	51
2	80	51
3	80	51
4	80	51
5	79	50
6	79	50
7	78	49
8	78	49
9	78	49
10	77	48
11	77	48
12	76	47
13	76	47
14	76	47
15	75	46
16	75	46
17	75	45
18	74	45
19	74	45
20	74	44
21	73	44
22	73	43
23	73	43
24	73	43
25	72	42
26	72	42
27	71	42
28	71	41
29	71	41
30	70	40

How September really feels in Montrose

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.

Montrose weather by month

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

Month	High / Low (°F)	Rainfall (inches)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	37° / 11°	1.2	7	7.3	9.6	0.0
Feb	41° / 17°	1.3	8	7.7	10.5	0.2
Mar	50° / 25°	1.5	9.1	6.8	11.7	2.5
Apr	58° / 31°	1.7	8.8	4.5	13	4.5
May	70° / 40°	1.3	7.7	0.8	14.1	7.0
Jun	82° / 49°	0.5	3.5	0	14.6	7.3
Jul	86° / 56°	0.8	6	0	14.4	5.5
Aug	83° / 54°	1.0	6.6	0	13.5	6.5
Sep	75° / 46°	1.1	5.9	0.1	12.3	7.8
Oct	63° / 34°	1.3	6.6	1.6	11	6.2
Nov	48° / 23°	1.3	6.5	5.5	9.9	2.1
Dec	38° / 12°	1.2	7.1	7.1	9.4	0.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 62% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 19% of September, with mostly cloudy or overcast conditions the remaining 20%. Skies tend to open up 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 (%)	79	79	79	79	79	79	79	79	78	78	78	79	80	80	80	80	81	82	82	82	82	82	81	82	82	82	81	81	81	81
Cloudier (%)	21	21	21	21	21	21	21	21	22	22	22	21	20	20	20	20	19	18	18	18	18	18	19	18	18	18	19	19	19	19

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

Chance of precipitation in September

Any precipitation

Montrose gets around 1.1 in of rain and snow over 5.9 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 20% and peaks near 23% 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
Rain chance (%)	18	19	19	20	20	21	21	21	22	22	22	23	23	22	22	22	21	20	20	19	19	18	18	18	18	19	19	19	20	20

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

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 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
Dry (%)	99	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
Comfortable (%)	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0

	Dry (%)	Comfortable (%)
1	99	1
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0
29	100	0
30	100	0

Wind in September

Winds average 4 mph in September.

Across September, daily wind ranges from about 4 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	4	4	4	4	4	4	4	4
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	4	calm
24	4	calm
25	4	calm
26	4	calm
27	4	calm
28	4	calm
29	4	calm
30	4	calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 54 min 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 78 minutes over September. Sunrise moves from 5:45 AM to 6:11 AM, and sunset from 6:38 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)	12.9	12.8	12.8	12.8	12.7	12.7	12.6	12.6	12.5	12.5	12.5	12.4	12.4	12.3	12.3	12.2	12.2	12.2	12.1	12.1	12.0	12.0	11.9	11.9	11.9	11.8	11.8	11.7	11.7	11.6
Sunrise (AM)	5:45	5:46	5:47	5:48	5:49	5:49	5:50	5:51	5:52	5:53	5:54	5:55	5:56	5:57	5:58	5:58	5:59	6:00	6:01	6:02	6:03	6:04	6:05	6:06	6:07	6:08	6:09	6:09	6:10	6:11
Sunset (PM)	6:38	6:36	6:34	6:33	6:31	6:30	6:28	6:26	6:25	6:23	6:21	6:20	6:18	6:16	6:15	6:13	6:12	6:10	6:08	6:07	6:05	6:03	6:02	6:00	5:58	5:57	5:55	5:53	5:52	5:50

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.9	5:45	6:38
2	12.8	5:46	6:36
3	12.8	5:47	6:34
4	12.8	5:48	6:33
5	12.7	5:49	6:31
6	12.7	5:49	6:30
7	12.6	5:50	6:28
8	12.6	5:51	6:26
9	12.5	5:52	6:25
10	12.5	5:53	6:23
11	12.5	5:54	6:21
12	12.4	5:55	6:20
13	12.4	5:56	6:18
14	12.3	5:57	6:16
15	12.3	5:58	6:15
16	12.2	5:58	6:13
17	12.2	5:59	6:12
18	12.2	6:00	6:10
19	12.1	6:01	6:08
20	12.1	6:02	6:07
21	12.0	6:03	6:05
22	12.0	6:04	6:03
23	11.9	6:05	6:02
24	11.9	6:06	6:00
25	11.9	6:07	5:58
26	11.8	6:08	5:57
27	11.8	6:09	5:55
28	11.7	6:09	5:53
29	11.7	6:10	5:52
30	11.6	6:11	5:50

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.8 kWh/m².

For context, solar energy here swings from a low near 2.58 kWh/m² to a high of 8.17 kWh/m² in June across the year — September's 5.8 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)	6.3	6.2	6.2	6.2	6.1	6.1	6.0	6.0	6.0	6.0	5.9	5.9	5.9	5.8	5.8	5.8	5.7	5.7	5.7	5.6	5.6	5.6	5.5	5.5	5.5	5.4	5.3	5.3	5.3	5.2
Level	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	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	6.3	Intense
2	6.2	Intense
3	6.2	Intense
4	6.2	Intense
5	6.1	Intense
6	6.1	Intense
7	6.0	Intense
8	6.0	Intense
9	6.0	Bright
10	6.0	Bright
11	5.9	Bright
12	5.9	Bright
13	5.9	Bright
14	5.8	Bright
15	5.8	Bright
16	5.8	Bright
17	5.7	Bright
18	5.7	Bright
19	5.7	Bright
20	5.6	Bright
21	5.6	Bright
22	5.6	Bright
23	5.5	Bright
24	5.5	Bright
25	5.5	Bright
26	5.4	Bright
27	5.3	Bright
28	5.3	Bright
29	5.3	Bright
30	5.2	Bright

Planning a trip in September

Is September a good time to visit Montrose?

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

7.8

Sightseeing

1st-best month of the year

6.5

Beach & pool

4th-best month of the year

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

What to pack for Montrose in September

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

In September, Montrose sees daytime highs around 75°F and nights near 46°F. Worth packing: light clothes, a warm layer and sun protection. About 6 days see rain.

light clothesa warm layersun protection

UV index in Montrose in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Montrose peaks around July 15 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 3 (moderate).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	3	4	7	6	8	11	12	11	8	6	4	3
Level	Moderate	Moderate	High	High	Very high	Extreme	Extreme	Extreme	Very high	High	Moderate	Moderate

	UV index (midday)	Level
Jan	3	Moderate
Feb	4	Moderate
Mar	7	High
Apr	6	High
May	8	Very high
Jun	11	Extreme
Jul	12	Extreme
Aug	11	Extreme
Sep	8	Very high
Oct	6	High
Nov	4	Moderate
Dec	3	Moderate

Location & terrain

Where is Montrose?

Montrose sits at 38.5°N, 107.9°W, 5,807 ft above sea level, in United States. The nearest listed city is Telluride, 37 mi away.

Topography around Montrose

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

Within 2 miles, the terrain around Montrose has only modest variations in elevation — a maximum elevation change of 308 ft around an average of 5,827 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 3,005 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 9,485 ft.

The land around Montrose is covered by artificial surfaces (35%) and grassland (25%) within 2 miles, grassland (33%) and trees (21%) within 10 miles, and trees (54%) and grassland (28%) within 50 miles.

2 miles

308 ft

artificial surfaces 35%

10 miles

3,005 ft

grassland 33%

50 miles

9,485 ft

trees 54%

treesshrubsgrasslandcroplandartificial surfacesbare terrainmoss and lichen

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

September weather nearby: Telluride 37 mi · Clifton 52 mi · Grand Junction 55 mi · Aspen 75 mi · Durango 83 mi · Moab 91 mi · Farmington 122 mi · Cañon City 142 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 Montrose (38.4783°, -107.8762°, elevation 5,807 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. 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	81	51
2	80	51
3	80	51
4	80	51
5	79	50
6	79	50
7	78	49
8	78	49
9	78	49
10	77	48
11	77	48
12	76	47
13	76	47
14	76	47
15	75	46
16	75	46
17	75	45
18	74	45
19	74	45
20	74	44
21	73	44
22	73	43
23	73	43
24	73	43
25	72	42
26	72	42
27	71	42
28	71	41
29	71	41
30	70	40

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

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

	Dry (%)	Comfortable (%)
1	99	1
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0
29	100	0
30	100	0

	Avg high (°F)	Avg low (°F)
1	81	51
2	80	51
3	80	51
4	80	51
5	79	50
6	79	50
7	78	49
8	78	49
9	78	49
10	77	48
11	77	48
12	76	47
13	76	47
14	76	47
15	75	46
16	75	46
17	75	45
18	74	45
19	74	45
20	74	44
21	73	44
22	73	43
23	73	43
24	73	43
25	72	42
26	72	42
27	71	42
28	71	41
29	71	41
30	70	40

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

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

	Dry (%)	Comfortable (%)
1	99	1
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0
29	100	0
30	100	0

	Avg high (°F)	Avg low (°F)
1	81	51
2	80	51
3	80	51
4	80	51
5	79	50
6	79	50
7	78	49
8	78	49
9	78	49
10	77	48
11	77	48
12	76	47
13	76	47
14	76	47
15	75	46
16	75	46
17	75	45
18	74	45
19	74	45
20	74	44
21	73	44
22	73	43
23	73	43
24	73	43
25	72	42
26	72	42
27	71	42
28	71	41
29	71	41
30	70	40

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

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

	Dry (%)	Comfortable (%)
1	99	1
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0
29	100	0
30	100	0