Pasto weather in September

In September, Pasto sees average daytime highs of 20°C and overnight lows near 10°C, with 99 mm of rain across 19.9 wet days and about 12 hours of daylight. It is the 1st-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 20°C through the month. The sky is clear or mostly clear about 3% of the time in September, and the air most often feels dry.

Daylight stretches from about 12 hours at the start of September to 12 hours by month's end. Set against the rest of the year, September is Pasto's 4th-clearest and 4th-windiest month. For the whole year in context, see Pasto's year-round climate.

Daytime high: 20°; 1st warmest
Overnight low: 10°; 2nd coldest
Rainfall: 99 mm; 19.9 wet days
Daylight: 12 hours; 6:03 AM – 6:04 PM
Cloud cover: 81%; 4th clearest
Wind: 7 km/h; 4th windiest
Solar energy: 5.65 kWh/m²
Travel score: 4.5; out of 10

Air quality: Good; PM2.5 9 µg/m³ · 2014

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

← August Pasto 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

Day-to-day highs hold fairly steady near 20°C through the month.

A typical September day in Pasto reaches about 20°C in the afternoon and slips back to 10°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 21°C. Set against its neighbours, September runs about 1°C warmer than August and on par with 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 (°C)	19	19	19	19	19	19	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20
Avg low (°C)	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10

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

Pasto weather by month

How September compares with the rest of the year at a glance. September is the 1st-warmest and 10th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	19° / 10°	177	22.4	11.9	4.1
Feb	19° / 11°	182	22.4	12	3.9
Mar	19° / 11°	236	27.5	12	3.5
Apr	19° / 11°	231	27.5	12	3.3
May	19° / 11°	181	27.3	12.1	3.5
Jun	18° / 10°	114	23.7	12.1	3.8
Jul	18° / 10°	92	22.2	12.1	4.2
Aug	19° / 10°	63	16.6	12	4.9
Sep	20° / 10°	99	19.9	12	4.5
Oct	19° / 10°	195	25.2	12	3.8
Nov	19° / 10°	244	26.5	11.9	3.5
Dec	19° / 10°	222	25.8	11.9	3.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 3% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 10% of September, with mostly cloudy or overcast conditions the remaining 87%.

	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 (%)	17	18	18	18	18	18	18	17	17	16	16	15	15	14	13	13	12	12	11	10	10	10	10	9	9	9	8	8	8	8
Cloudier (%)	83	82	82	82	82	82	82	83	83	84	84	85	85	86	87	87	88	88	89	90	90	90	90	91	91	91	92	92	92	92

	Clearer (%)	Cloudier (%)
1	17	83
2	18	82
3	18	82
4	18	82
5	18	82
6	18	82
7	18	82
8	17	83
9	17	83
10	16	84
11	16	84
12	15	85
13	15	85
14	14	86
15	13	87
16	13	87
17	12	88
18	12	88
19	11	89
20	10	90
21	10	90
22	10	90
23	10	90
24	9	91
25	9	91
26	9	91
27	8	92
28	8	92
29	8	92
30	8	92

Chance of precipitation in September

Any precipitation

Pasto gets around 99 mm of rain over 19.9 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 66% and peaks near 75% 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 (%)	57	57	57	58	58	58	59	59	60	61	61	62	63	64	65	66	67	68	69	70	71	71	72	73	73	74	74	74	74	75

	Rain chance (%)
1	57
2	57
3	57
4	58
5	58
6	58
7	59
8	59
9	60
10	61
11	61
12	62
13	63
14	64
15	65
16	66
17	67
18	68
19	69
20	70
21	71
22	71
23	72
24	73
25	73
26	74
27	74
28	74
29	74
30	75

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 (%)	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

Wind in September

Winds average 7 km/h in September.

Across September, daily wind ranges from about 6 km/h on the calmest days to 8 km/h 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 (km/h)	8	8	8	8	8	8	8	7	7	7	7	7	7	7	7	7	7	7	7	7	7	6	6	6	6	6	6	6	6	6
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 (km/h)	Feels
1	8	calm
2	8	calm
3	8	calm
4	8	calm
5	8	calm
6	8	calm
7	8	calm
8	7	calm
9	7	calm
10	7	calm
11	7	calm
12	7	calm
13	7	calm
14	7	calm
15	7	calm
16	7	calm
17	7	calm
18	7	calm
19	7	calm
20	7	calm
21	7	calm
22	6	calm
23	6	calm
24	6	calm
25	6	calm
26	6	calm
27	6	calm
28	6	calm
29	6	calm
30	6	calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 hours at the start of September to 12 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 0 minutes over September. Sunrise moves from 6:08 AM to 5:59 AM, and sunset from 6:10 PM to 5:58 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)	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0
Sunrise (AM)	6:08	6:08	6:08	6:07	6:07	6:07	6:06	6:06	6:06	6:05	6:05	6:05	6:04	6:04	6:04	6:03	6:03	6:03	6:02	6:02	6:02	6:01	6:01	6:01	6:00	6:00	6:00	5:59	5:59	5:59
Sunset (PM)	6:10	6:09	6:09	6:08	6:08	6:08	6:07	6:07	6:06	6:06	6:06	6:05	6:05	6:04	6:04	6:04	6:03	6:03	6:02	6:02	6:02	6:01	6:01	6:00	6:00	6:00	5:59	5:59	5:59	5:58

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.0	6:08	6:10
2	12.0	6:08	6:09
3	12.0	6:08	6:09
4	12.0	6:07	6:08
5	12.0	6:07	6:08
6	12.0	6:07	6:08
7	12.0	6:06	6:07
8	12.0	6:06	6:07
9	12.0	6:06	6:06
10	12.0	6:05	6:06
11	12.0	6:05	6:06
12	12.0	6:05	6:05
13	12.0	6:04	6:05
14	12.0	6:04	6:04
15	12.0	6:04	6:04
16	12.0	6:03	6:04
17	12.0	6:03	6:03
18	12.0	6:03	6:03
19	12.0	6:02	6:02
20	12.0	6:02	6:02
21	12.0	6:02	6:02
22	12.0	6:01	6:01
23	12.0	6:01	6:01
24	12.0	6:01	6:00
25	12.0	6:00	6:00
26	12.0	6:00	6:00
27	12.0	6:00	5:59
28	12.0	5:59	5:59
29	12.0	5:59	5:59
30	12.0	5:59	5:58

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.65 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.61 kWh/m² to a high of 5.65 kWh/m² in September across the year — September's 5.65 kWh/m² sits near the top of that range.

	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)	5.7	5.7	5.7	5.7	5.7	5.7	5.7	5.7	5.7	5.7	5.7	5.7	5.7	5.7	5.7	5.7	5.7	5.7	5.6	5.6	5.6	5.6	5.6	5.6	5.6	5.5	5.5	5.5	5.5	5.5
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	5.7	Bright
2	5.7	Bright
3	5.7	Bright
4	5.7	Bright
5	5.7	Bright
6	5.7	Bright
7	5.7	Bright
8	5.7	Bright
9	5.7	Bright
10	5.7	Bright
11	5.7	Bright
12	5.7	Bright
13	5.7	Bright
14	5.7	Bright
15	5.7	Bright
16	5.7	Bright
17	5.7	Bright
18	5.7	Bright
19	5.6	Bright
20	5.6	Bright
21	5.6	Bright
22	5.6	Bright
23	5.6	Bright
24	5.6	Bright
25	5.6	Bright
26	5.5	Bright
27	5.5	Bright
28	5.5	Bright
29	5.5	Bright
30	5.5	Bright

Planning a trip in September

Is September a good time to visit Pasto?

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

4.5

Sightseeing

2nd-best month of the year

2.2

Beach & pool

1st-best month of the year

September is a reasonable time to visit Pasto for sightseeing.

What to pack for Pasto in September

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

In September, Pasto sees daytime highs around 20°C and nights near 10°C. Pack rain gear. Worth having: sun protection. About 20 days see rain.

rain gearsun protection

UV index in Pasto in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 15 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Pasto peaks around February 20 at about 17 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 23 at about 13 (extreme).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	16	17	17	15	16	14	13	13	15	15	13	13
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	16	Extreme
Feb	17	Extreme
Mar	17	Extreme
Apr	15	Extreme
May	16	Extreme
Jun	14	Extreme
Jul	13	Extreme
Aug	13	Extreme
Sep	15	Extreme
Oct	15	Extreme
Nov	13	Extreme
Dec	13	Extreme

Location & terrain

Where is Pasto?

Pasto sits at 1.2°N, 77.3°W, 2,569 m above sea level, in Colombia. The nearest listed city is Buesaco, 23 km away.

Topography around Pasto

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Pasto.

Within 3 km, the terrain around Pasto has significant variations in elevation — a maximum elevation change of 424 m around an average of 2,616 m above sea level; within 16 km, extreme variations in elevation — a maximum elevation change of 2,750 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,628 m.

The land around Pasto is covered by artificial surfaces (53%) and grassland (31%) within 3 km, trees (57%) and grassland (37%) within 16 km, and trees (76%) and grassland (23%) within 80 km.

3 km

424 m

artificial surfaces 53%

16 km

2,750 m

trees 57%

80 km

4,628 m

trees 76%

treesshrubsgrasslandcroplandartificial surfaceswater

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

September weather nearby: Buesaco 23 km · San Lorenzo 33 km · Samaniego 38 km · Túquerres 40 km · Providencia 45 km · La Unión 46 km · Pupiales 55 km · Ipiales 59 km

Colombia travel facts

Travel advisory: Level 3; Reconsider Travel
Power plugs: Type A / B; 120 / 240 V · 60 Hz
Prices: ≈ 38% of US; price level, 2025
GDP per capita: $8,562; 2025
Happiness: 6.0 / 10; World Happiness, 2025
Safe drinking water: 74%; of population, 2024
Homicide rate: 24.9; per 100k, 2023
Road deaths: 15.4; per 100k/yr, 2019
Income group: Upper middle; World Bank
English: Low; EF EPI 480
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 Pasto (1.2146°, -77.2785°, elevation 2,569 m), 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 (°C)	Avg low (°C)
1	19	10
2	19	10
3	19	10
4	19	10
5	19	10
6	19	10
7	20	10
8	20	10
9	20	10
10	20	10
11	20	10
12	20	10
13	20	10
14	20	10
15	20	10
16	20	10
17	20	10
18	20	10
19	20	10
20	20	10
21	20	10
22	20	10
23	20	10
24	20	10
25	20	10
26	20	10
27	20	10
28	20	10
29	20	10
30	20	10

	Clearer (%)	Cloudier (%)
1	17	83
2	18	82
3	18	82
4	18	82
5	18	82
6	18	82
7	18	82
8	17	83
9	17	83
10	16	84
11	16	84
12	15	85
13	15	85
14	14	86
15	13	87
16	13	87
17	12	88
18	12	88
19	11	89
20	10	90
21	10	90
22	10	90
23	10	90
24	9	91
25	9	91
26	9	91
27	8	92
28	8	92
29	8	92
30	8	92

	Rain chance (%)
1	57
2	57
3	57
4	58
5	58
6	58
7	59
8	59
9	60
10	61
11	61
12	62
13	63
14	64
15	65
16	66
17	67
18	68
19	69
20	70
21	71
22	71
23	72
24	73
25	73
26	74
27	74
28	74
29	74
30	75

	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

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

	Clearer (%)	Cloudier (%)
1	17	83
2	18	82
3	18	82
4	18	82
5	18	82
6	18	82
7	18	82
8	17	83
9	17	83
10	16	84
11	16	84
12	15	85
13	15	85
14	14	86
15	13	87
16	13	87
17	12	88
18	12	88
19	11	89
20	10	90
21	10	90
22	10	90
23	10	90
24	9	91
25	9	91
26	9	91
27	8	92
28	8	92
29	8	92
30	8	92

	Rain chance (%)
1	57
2	57
3	57
4	58
5	58
6	58
7	59
8	59
9	60
10	61
11	61
12	62
13	63
14	64
15	65
16	66
17	67
18	68
19	69
20	70
21	71
22	71
23	72
24	73
25	73
26	74
27	74
28	74
29	74
30	75

	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

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

	Clearer (%)	Cloudier (%)
1	17	83
2	18	82
3	18	82
4	18	82
5	18	82
6	18	82
7	18	82
8	17	83
9	17	83
10	16	84
11	16	84
12	15	85
13	15	85
14	14	86
15	13	87
16	13	87
17	12	88
18	12	88
19	11	89
20	10	90
21	10	90
22	10	90
23	10	90
24	9	91
25	9	91
26	9	91
27	8	92
28	8	92
29	8	92
30	8	92

	Rain chance (%)
1	57
2	57
3	57
4	58
5	58
6	58
7	59
8	59
9	60
10	61
11	61
12	62
13	63
14	64
15	65
16	66
17	67
18	68
19	69
20	70
21	71
22	71
23	72
24	73
25	73
26	74
27	74
28	74
29	74
30	75

	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