Ocosingo weather in September

In September, Ocosingo sees average daytime highs of 27°C and overnight lows near 18°C, with 266 mm of rain across 26.9 wet days and about 12.1 hours of daylight. It is the 6th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 6% of the time in September, and the air most often feels muggy.

Daylight stretches from about 12 h 18 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Ocosingo's 12th-clearest and 12th-windiest month. For the whole year in context, see Ocosingo's year-round climate.

Daytime high: 27°; 6th warmest
Overnight low: 18°; 11th coldest
Rainfall: 266 mm; 26.9 wet days
Daylight: 12 h 06 min; 6:00 AM – 6:06 PM
Cloud cover: 81%; 12th clearest
Wind: 4 km/h; 12th windiest
Solar energy: 5.06 kWh/m²
Travel score: 3.8; out of 10

Ocosingo is municipal seat of Ocosingo, State of Chiapas, Mexico.

Founded: 1564

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

← August Ocosingo 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 27°C through the month.

A typical September day in Ocosingo reaches about 27°C in the afternoon and slips back to 18°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 28°C. Set against its neighbours, September runs on par with August and about 1°C 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 (°C)	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	26	26	26	26	26	26	26	26	26
Avg low (°C)	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18

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

Ocosingo weather by month

How September compares with the rest of the year at a glance. September is the 6th-warmest and 2nd-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	23° / 13°	97	12.7	11.1	6.5
Feb	24° / 13°	59	9	11.4	7.2
Mar	27° / 14°	58	9.4	11.9	7.0
Apr	29° / 16°	87	11.4	12.4	5.7
May	29° / 18°	158	17.7	12.8	4.7
Jun	27° / 18°	283	23.8	13	4.2
Jul	27° / 17°	149	19.9	12.9	4.9
Aug	27° / 18°	203	24.2	12.6	4.3
Sep	27° / 18°	266	26.9	12.1	3.8
Oct	25° / 17°	224	22.1	11.6	4.7
Nov	24° / 15°	146	16	11.2	5.9
Dec	23° / 14°	94	12.7	11	6.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 6% of the time in September, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 10% of September, with mostly cloudy or overcast conditions the remaining 84%.

	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 (%)	21	20	20	19	19	18	17	17	17	16	16	16	16	16	15	15	15	15	15	15	15	15	15	14	14	14	14	14	15	15
Cloudier (%)	79	80	80	81	81	82	83	83	83	84	84	84	84	84	85	85	85	85	85	85	85	85	85	86	86	86	86	86	85	85

	Clearer (%)	Cloudier (%)
1	21	79
2	20	80
3	20	80
4	19	81
5	19	81
6	18	82
7	17	83
8	17	83
9	17	83
10	16	84
11	16	84
12	16	84
13	16	84
14	16	84
15	15	85
16	15	85
17	15	85
18	15	85
19	15	85
20	15	85
21	15	85
22	15	85
23	15	85
24	14	86
25	14	86
26	14	86
27	14	86
28	14	86
29	15	85
30	15	85

Chance of precipitation in September

Any precipitation

Ocosingo gets around 266 mm of rain over 26.9 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 89% and peaks near 90% on the wettest days.

	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 (%)	88	89	89	89	89	89	88	88	88	88	88	88	88	88	89	89	89	90	90	90	90	90	90	90	90	89	88	87	87	86

	Rain chance (%)
1	88
2	89
3	89
4	89
5	89
6	89
7	88
8	88
9	88
10	88
11	88
12	88
13	88
14	88
15	89
16	89
17	89
18	90
19	90
20	90
21	90
22	90
23	90
24	90
25	90
26	89
27	88
28	87
29	87
30	86

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 84% of days. Sticky, muggy-or-worse air turns up on roughly 84% of them.

	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
Comfortable (%)	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	1	1	1	1
Humid (%)	21	20	19	19	18	18	18	17	17	17	17	16	16	16	15	15	14	13	13	13	13	12	13	13	14	14	15	16	17	18
Muggy (%)	79	80	81	81	82	82	82	83	83	83	83	84	84	84	85	85	86	87	87	87	87	88	87	87	86	86	84	83	82	81

	Comfortable (%)	Humid (%)	Muggy (%)
1	0	21	79
2	0	20	80
3	0	19	81
4	0	19	81
5	0	18	82
6	0	18	82
7	0	18	82
8	0	17	83
9	0	17	83
10	0	17	83
11	0	17	83
12	0	16	84
13	0	16	84
14	0	16	84
15	0	15	85
16	0	15	85
17	0	14	86
18	0	13	87
19	0	13	87
20	0	13	87
21	0	13	87
22	0	12	88
23	0	13	87
24	0	13	87
25	0	14	86
26	0	14	86
27	1	15	84
28	1	16	83
29	1	17	82
30	1	18	81

Wind in September

Winds average 4 km/h in September, the calmest month.

Across September, daily wind ranges from about 4 km/h on the calmest days to 4 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)	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 (km/h)	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 18 min at the start of September to 11 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 24 minutes over September. Sunrise moves from 5:58 AM to 6:02 AM, and sunset from 6:18 PM to 5:54 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)	12.3	12.3	12.3	12.3	12.3	12.3	12.2	12.2	12.2	12.2	12.2	12.2	12.1	12.1	12.1	12.1	12.1	12.1	12.0	12.0	12.0	12.0	12.0	12.0	11.9	11.9	11.9	11.9	11.9	11.9
Sunrise (AM)	5:58	5:58	5:58	5:58	5:59	5:59	5:59	5:59	5:59	5:59	5:59	5:59	6:00	6:00	6:00	6:00	6:00	6:00	6:00	6:00	6:00	6:01	6:01	6:01	6:01	6:01	6:01	6:01	6:02	6:02
Sunset (PM)	6:18	6:17	6:17	6:16	6:15	6:14	6:13	6:12	6:12	6:11	6:10	6:09	6:08	6:07	6:06	6:06	6:05	6:04	6:03	6:02	6:01	6:00	6:00	5:59	5:58	5:57	5:56	5:55	5:54	5:54

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.3	5:58	6:18
2	12.3	5:58	6:17
3	12.3	5:58	6:17
4	12.3	5:58	6:16
5	12.3	5:59	6:15
6	12.3	5:59	6:14
7	12.2	5:59	6:13
8	12.2	5:59	6:12
9	12.2	5:59	6:12
10	12.2	5:59	6:11
11	12.2	5:59	6:10
12	12.2	5:59	6:09
13	12.1	6:00	6:08
14	12.1	6:00	6:07
15	12.1	6:00	6:06
16	12.1	6:00	6:06
17	12.1	6:00	6:05
18	12.1	6:00	6:04
19	12.0	6:00	6:03
20	12.0	6:00	6:02
21	12.0	6:00	6:01
22	12.0	6:01	6:00
23	12.0	6:01	6:00
24	12.0	6:01	5:59
25	11.9	6:01	5:58
26	11.9	6:01	5:57
27	11.9	6:01	5:56
28	11.9	6:01	5:55
29	11.9	6:02	5:54
30	11.9	6:02	5:54

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.06 kWh/m².

For context, solar energy here swings from a low near 4.07 kWh/m² to a high of 6.51 kWh/m² in April across the year — September's 5.06 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)	5.5	5.5	5.5	5.4	5.4	5.4	5.4	5.3	5.3	5.3	5.3	5.3	5.2	5.2	5.2	5.1	5.1	5.0	5.0	5.0	4.9	4.9	4.8	4.8	4.8	4.7	4.7	4.7	4.6	4.6
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	5.5	Bright
2	5.5	Bright
3	5.5	Bright
4	5.4	Bright
5	5.4	Bright
6	5.4	Bright
7	5.4	Bright
8	5.3	Bright
9	5.3	Bright
10	5.3	Bright
11	5.3	Bright
12	5.3	Bright
13	5.2	Bright
14	5.2	Bright
15	5.2	Bright
16	5.1	Bright
17	5.1	Bright
18	5.0	Bright
19	5.0	Bright
20	5.0	Bright
21	4.9	Bright
22	4.9	Bright
23	4.8	Bright
24	4.8	Bright
25	4.8	Bright
26	4.7	Bright
27	4.7	Bright
28	4.7	Bright
29	4.6	Bright
30	4.6	Bright

Planning a trip in September

Is September a good time to visit Ocosingo?

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

3.8

Sightseeing

12th-best month of the year

3.9

Beach & pool

12th-best month of the year

September is a weaker month for outdoor sightseeing in Ocosingo.

What to pack for Ocosingo in September

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

In September, Ocosingo sees daytime highs around 27°C and nights near 18°C. Pack rain gear. Worth having: light clothes and sun protection. About 27 days see rain.

rain gearlight clothessun protection

UV index in Ocosingo in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Ocosingo peaks around April 12 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 8 (very high).

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)	9	13	13	15	10	14	13	14	13	11	9	8
Level	Very high	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	Very high

	UV index (midday)	Level
Jan	9	Very high
Feb	13	Extreme
Mar	13	Extreme
Apr	15	Extreme
May	10	Extreme
Jun	14	Extreme
Jul	13	Extreme
Aug	14	Extreme
Sep	13	Extreme
Oct	11	Extreme
Nov	9	Very high
Dec	8	Very high

Air quality in Ocosingo 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 Ocosingo is worst in April — around 80 µg/m³ PM2.5 (unhealthy), about 6.5× the cleanest month (December, 12 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)	13	14	20	80	77	27	26	22	21	17	15	12
Level	Moderate	Moderate	Moderate	Unhealthy	Unhealthy	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	13	Moderate
Feb	14	Moderate
Mar	20	Moderate
Apr	80	Unhealthy
May	77	Unhealthy
Jun	27	Moderate
Jul	26	Moderate
Aug	22	Moderate
Sep	21	Moderate
Oct	17	Moderate
Nov	15	Moderate
Dec	12	Moderate

Location & terrain

Where is Ocosingo?

Ocosingo sits at 16.9°N, 92.1°W, 882 m above sea level, in Mexico. The nearest listed city is Yajalón, 39 km away.

Topography around Ocosingo

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

Within 3 km, the terrain around Ocosingo has significant variations in elevation — a maximum elevation change of 481 m around an average of 926 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,333 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,870 m.

The land around Ocosingo is covered by trees (39%), grassland (36%) and artificial surfaces (25%) within 3 km, trees (82%) within 16 km, and trees (77%) and grassland (20%) within 80 km.

3 km

481 m

trees 39%

16 km

1,333 m

trees 82%

80 km

2,870 m

trees 77%

treesshrubsgrasslandcroplandartificial surfaces

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

September weather nearby: Yajalón 39 km · Teopisca 57 km · San Cristóbal de las Casas 61 km · Las Rosas 67 km · Las Margaritas 67 km · Palenque 68 km · Comitán 74 km · Venustiano Carranza 81 km

Mexico travel facts

Travel advisory: Level 2; Exercise Increased Caution
Power plugs: Type A / B; 120 / 127 V · 60 Hz
Prices: ≈ 54% of US; price level, 2025
GDP per capita: $13,889; 2025
Happiness: 7.0 / 10; World Happiness, 2025
Safe drinking water: 43%; of population, 2024
Homicide rate: 24.9; per 100k, 2023
Road deaths: 12.8; per 100k/yr, 2019
Income group: Upper middle; World Bank
English: Very low; EF EPI 440
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 Ocosingo (16.9063°, -92.0935°, elevation 882 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. 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 (°C)	Avg low (°C)
1	27	18
2	27	18
3	27	18
4	27	18
5	27	18
6	27	18
7	27	18
8	27	18
9	27	18
10	27	18
11	27	18
12	27	18
13	27	18
14	27	18
15	27	18
16	27	18
17	27	18
18	27	18
19	27	18
20	27	18
21	27	18
22	26	18
23	26	18
24	26	18
25	26	18
26	26	18
27	26	18
28	26	18
29	26	18
30	26	18

	Clearer (%)	Cloudier (%)
1	21	79
2	20	80
3	20	80
4	19	81
5	19	81
6	18	82
7	17	83
8	17	83
9	17	83
10	16	84
11	16	84
12	16	84
13	16	84
14	16	84
15	15	85
16	15	85
17	15	85
18	15	85
19	15	85
20	15	85
21	15	85
22	15	85
23	15	85
24	14	86
25	14	86
26	14	86
27	14	86
28	14	86
29	15	85
30	15	85

	Rain chance (%)
1	88
2	89
3	89
4	89
5	89
6	89
7	88
8	88
9	88
10	88
11	88
12	88
13	88
14	88
15	89
16	89
17	89
18	90
19	90
20	90
21	90
22	90
23	90
24	90
25	90
26	89
27	88
28	87
29	87
30	86

	Comfortable (%)	Humid (%)	Muggy (%)
1	0	21	79
2	0	20	80
3	0	19	81
4	0	19	81
5	0	18	82
6	0	18	82
7	0	18	82
8	0	17	83
9	0	17	83
10	0	17	83
11	0	17	83
12	0	16	84
13	0	16	84
14	0	16	84
15	0	15	85
16	0	15	85
17	0	14	86
18	0	13	87
19	0	13	87
20	0	13	87
21	0	13	87
22	0	12	88
23	0	13	87
24	0	13	87
25	0	14	86
26	0	14	86
27	1	15	84
28	1	16	83
29	1	17	82
30	1	18	81

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

	Clearer (%)	Cloudier (%)
1	21	79
2	20	80
3	20	80
4	19	81
5	19	81
6	18	82
7	17	83
8	17	83
9	17	83
10	16	84
11	16	84
12	16	84
13	16	84
14	16	84
15	15	85
16	15	85
17	15	85
18	15	85
19	15	85
20	15	85
21	15	85
22	15	85
23	15	85
24	14	86
25	14	86
26	14	86
27	14	86
28	14	86
29	15	85
30	15	85

	Rain chance (%)
1	88
2	89
3	89
4	89
5	89
6	89
7	88
8	88
9	88
10	88
11	88
12	88
13	88
14	88
15	89
16	89
17	89
18	90
19	90
20	90
21	90
22	90
23	90
24	90
25	90
26	89
27	88
28	87
29	87
30	86

	Comfortable (%)	Humid (%)	Muggy (%)
1	0	21	79
2	0	20	80
3	0	19	81
4	0	19	81
5	0	18	82
6	0	18	82
7	0	18	82
8	0	17	83
9	0	17	83
10	0	17	83
11	0	17	83
12	0	16	84
13	0	16	84
14	0	16	84
15	0	15	85
16	0	15	85
17	0	14	86
18	0	13	87
19	0	13	87
20	0	13	87
21	0	13	87
22	0	12	88
23	0	13	87
24	0	13	87
25	0	14	86
26	0	14	86
27	1	15	84
28	1	16	83
29	1	17	82
30	1	18	81

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

	Clearer (%)	Cloudier (%)
1	21	79
2	20	80
3	20	80
4	19	81
5	19	81
6	18	82
7	17	83
8	17	83
9	17	83
10	16	84
11	16	84
12	16	84
13	16	84
14	16	84
15	15	85
16	15	85
17	15	85
18	15	85
19	15	85
20	15	85
21	15	85
22	15	85
23	15	85
24	14	86
25	14	86
26	14	86
27	14	86
28	14	86
29	15	85
30	15	85

	Rain chance (%)
1	88
2	89
3	89
4	89
5	89
6	89
7	88
8	88
9	88
10	88
11	88
12	88
13	88
14	88
15	89
16	89
17	89
18	90
19	90
20	90
21	90
22	90
23	90
24	90
25	90
26	89
27	88
28	87
29	87
30	86

	Comfortable (%)	Humid (%)	Muggy (%)
1	0	21	79
2	0	20	80
3	0	19	81
4	0	19	81
5	0	18	82
6	0	18	82
7	0	18	82
8	0	17	83
9	0	17	83
10	0	17	83
11	0	17	83
12	0	16	84
13	0	16	84
14	0	16	84
15	0	15	85
16	0	15	85
17	0	14	86
18	0	13	87
19	0	13	87
20	0	13	87
21	0	13	87
22	0	12	88
23	0	13	87
24	0	13	87
25	0	14	86
26	0	14	86
27	1	15	84
28	1	16	83
29	1	17	82
30	1	18	81