Sumpango weather in September

In September, Sumpango sees average daytime highs of 24°C and overnight lows near 15°C, with 204 mm of rain across 24.1 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 24°C through the month. The sky is clear or mostly clear about 3% of the time in September, and the air most often feels comfortable.

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 Sumpango's 11th-clearest and 12th-windiest month. For the whole year in context, see Sumpango's year-round climate.

Daytime high: 24°; 6th warmest
Overnight low: 15°; 10th coldest
Rainfall: 204 mm; 24.1 wet days
Daylight: 12 h 06 min; 5:55 AM – 6:00 PM
Cloud cover: 83%; 11th clearest
Wind: 5 km/h; 12th windiest
Solar energy: 4.92 kWh/m²
Travel score: 4.4; out of 10

← August Sumpango 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 24°C through the month.

A typical September day in Sumpango reaches about 24°C in the afternoon and slips back to 15°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 26°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)	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	23	23	23
Avg low (°C)	14	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15

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

Sumpango 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° / 11°	6	1.8	11.2	8.5
Feb	24° / 12°	5	1.3	11.5	8.7
Mar	26° / 13°	15	3.8	11.9	8.0
Apr	26° / 14°	51	7.9	12.3	7.0
May	25° / 15°	133	17.7	12.7	5.4
Jun	24° / 15°	221	23.9	12.8	4.5
Jul	24° / 14°	116	17.3	12.8	5.5
Aug	24° / 14°	136	19.1	12.5	5.3
Sep	24° / 15°	204	24.1	12.1	4.4
Oct	23° / 14°	152	19	11.7	5.2
Nov	22° / 13°	41	7.1	11.3	7.1
Dec	23° / 12°	13	2.8	11.1	8.1

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 11% of September, with mostly cloudy or overcast conditions the remaining 86%.

	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	17	17	16	16	16	16	15	15	15	15	15	15	15	15	15	14	14	14	13	13	13	13	12	12	12	12	12	12	12
Cloudier (%)	83	83	83	84	84	84	84	85	85	85	85	85	85	85	85	85	86	86	86	87	87	87	87	88	88	88	88	88	88	88

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

Chance of precipitation in September

Any precipitation

Sumpango gets around 204 mm of rain over 24.1 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 79% and peaks near 83% 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 (%)	76	77	77	78	78	78	78	78	78	77	77	77	77	78	78	78	79	79	80	80	81	81	82	82	83	83	83	82	82	81

	Rain chance (%)
1	76
2	77
3	77
4	78
5	78
6	78
7	78
8	78
9	78
10	77
11	77
12	77
13	77
14	78
15	78
16	78
17	79
18	79
19	80
20	80
21	81
22	81
23	82
24	82
25	83
26	83
27	83
28	82
29	82
30	81

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the comfortable band about 72% 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 (%)	9	9	9	8	8	8	8	7	7	7	7	7	6	6	6	5	5	5	4	4	3	3	2	2	2	2	2	2	2	2
Comfortable (%)	76	76	76	76	76	75	75	75	75	74	73	72	72	71	70	70	70	69	69	68	69	69	69	69	69	69	69	69	69	69
Humid (%)	15	15	15	16	16	17	17	18	18	19	20	21	22	23	24	25	25	26	27	28	28	28	29	29	29	29	29	29	29	29

	Dry (%)	Comfortable (%)	Humid (%)
1	9	76	15
2	9	76	15
3	9	76	15
4	8	76	16
5	8	76	16
6	8	75	17
7	8	75	17
8	7	75	18
9	7	75	18
10	7	74	19
11	7	73	20
12	7	72	21
13	6	72	22
14	6	71	23
15	6	70	24
16	5	70	25
17	5	70	25
18	5	69	26
19	4	69	27
20	4	68	28
21	3	69	28
22	3	69	28
23	2	69	29
24	2	69	29
25	2	69	29
26	2	69	29
27	2	69	29
28	2	69	29
29	2	69	29
30	2	69	29

Wind in September

Winds average 5 km/h in September, the calmest month.

Across September, daily wind ranges from about 5 km/h on the calmest days to 6 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)	6	6	6	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5
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	6	calm
2	6	calm
3	6	calm
4	5	calm
5	5	calm
6	5	calm
7	5	calm
8	5	calm
9	5	calm
10	5	calm
11	5	calm
12	5	calm
13	5	calm
14	5	calm
15	5	calm
16	5	calm
17	5	calm
18	5	calm
19	5	calm
20	5	calm
21	5	calm
22	5	calm
23	5	calm
24	5	calm
25	5	calm
26	5	calm
27	5	calm
28	5	calm
29	5	calm
30	5	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 5:54 AM to 5:56 AM, and sunset from 6:11 PM to 5:49 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	12.2	12.2	12.2	12.2	12.2	12.2	12.2	12.2	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.0	12.0	12.0	12.0	12.0	12.0	12.0	11.9	11.9	11.9	11.9	11.9
Sunrise (AM)	5:54	5:54	5:54	5:54	5:54	5:54	5:54	5:54	5:54	5:55	5:55	5:55	5:55	5:55	5:55	5:55	5:55	5:55	5:55	5:55	5:55	5:55	5:55	5:55	5:55	5:55	5:55	5:56	5:56	5:56
Sunset (PM)	6:11	6:11	6:10	6:09	6:08	6:08	6:07	6:06	6:05	6:04	6:04	6:03	6:02	6:01	6:00	6:00	5:59	5:58	5:57	5:57	5:56	5:55	5:54	5:53	5:53	5:52	5:51	5:50	5:50	5:49

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.3	5:54	6:11
2	12.3	5:54	6:11
3	12.3	5:54	6:10
4	12.2	5:54	6:09
5	12.2	5:54	6:08
6	12.2	5:54	6:08
7	12.2	5:54	6:07
8	12.2	5:54	6:06
9	12.2	5:54	6:05
10	12.2	5:55	6:04
11	12.2	5:55	6:04
12	12.1	5:55	6:03
13	12.1	5:55	6:02
14	12.1	5:55	6:01
15	12.1	5:55	6:00
16	12.1	5:55	6:00
17	12.1	5:55	5:59
18	12.1	5:55	5:58
19	12.0	5:55	5:57
20	12.0	5:55	5:57
21	12.0	5:55	5:56
22	12.0	5:55	5:55
23	12.0	5:55	5:54
24	12.0	5:55	5:53
25	12.0	5:55	5:53
26	11.9	5:55	5:52
27	11.9	5:55	5:51
28	11.9	5:56	5:50
29	11.9	5:56	5:50
30	11.9	5:56	5:49

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.92 kWh/m².

For context, solar energy here swings from a low near 4.54 kWh/m² to a high of 6.19 kWh/m² in April across the year — September's 4.92 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)	5.3	5.3	5.3	5.3	5.3	5.2	5.2	5.2	5.2	5.1	5.1	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	4.6	4.6	4.5	4.5
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	5.3	Bright
2	5.3	Bright
3	5.3	Bright
4	5.3	Bright
5	5.3	Bright
6	5.2	Bright
7	5.2	Bright
8	5.2	Bright
9	5.2	Bright
10	5.1	Bright
11	5.1	Bright
12	5.1	Bright
13	5.1	Bright
14	5.0	Bright
15	5.0	Bright
16	5.0	Bright
17	4.9	Bright
18	4.9	Bright
19	4.8	Bright
20	4.8	Bright
21	4.8	Bright
22	4.7	Bright
23	4.7	Bright
24	4.7	Bright
25	4.6	Bright
26	4.6	Bright
27	4.6	Bright
28	4.6	Bright
29	4.5	Bright
30	4.5	Bright

Planning a trip in September

Hazard calendar for Sumpango

In seasonPeak

In September, Sumpango sits inside its monsoon season. The full year is below, with each hazard's peak months called out.

Sumpango's monsoon runs May–October, when most of the year's rain falls.

Monsoon

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is September a good time to visit Sumpango?

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

4.4

Sightseeing

12th-best month of the year

3.8

Beach & pool

12th-best month of the year

September is a reasonable time to visit Sumpango for sightseeing.

What to pack for Sumpango in September

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

In September, Sumpango sees daytime highs around 24°C and nights near 15°C. Pack rain gear. Worth having: light clothes and sun protection. About 24 days see rain.

rain gearlight clothessun protection

UV index in Sumpango 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 Sumpango peaks around April 13 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 13 at about 9 (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)	10	14	14	15	13	13	13	13	13	12	10	9
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	Very high

	UV index (midday)	Level
Jan	10	Extreme
Feb	14	Extreme
Mar	14	Extreme
Apr	15	Extreme
May	13	Extreme
Jun	13	Extreme
Jul	13	Extreme
Aug	13	Extreme
Sep	13	Extreme
Oct	12	Extreme
Nov	10	Very high
Dec	9	Very high

Air quality in Sumpango 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 Sumpango is worst in April — around 48 µg/m³ PM2.5 (poor), about 2.2× the cleanest month (August, 22 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)	26	26	31	48	37	25	23	22	24	23	22	24
Level	Moderate	Moderate	Moderate	Poor	Poor	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	26	Moderate
Feb	26	Moderate
Mar	31	Moderate
Apr	48	Poor
May	37	Poor
Jun	25	Moderate
Jul	23	Moderate
Aug	22	Moderate
Sep	24	Moderate
Oct	23	Moderate
Nov	22	Moderate
Dec	24	Moderate

Location & terrain

Where is Sumpango?

Sumpango sits at 14.6°N, 90.7°W, 1,900 m above sea level, in Guatemala. The nearest listed city is El Tejar, 6.0 km away.

Topography around Sumpango

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

Within 3 km, the terrain around Sumpango has significant variations in elevation — a maximum elevation change of 496 m around an average of 1,895 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,560 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,937 m.

The land around Sumpango is covered by trees (39%) and cropland (37%) within 3 km, trees (68%) within 16 km, and trees (65%) within 80 km.

3 km

496 m

trees 39%

16 km

1,560 m

trees 68%

80 km

3,937 m

trees 65%

treesshrubsgrasslandcroplandartificial surfaceswater

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

September weather nearby: El Tejar 6.0 km · Santiago Sacatepéquez 6.0 km · Jocotenango 8.0 km · San Lucas Sacatepéquez 9.0 km · Chimaltenango 9.0 km · Antigua Guatemala 10 km · San Andrés Itzapa 12 km · San Juan Sacatepéquez 13 km

Guatemala travel facts

Travel advisory: Level 3; Reconsider Travel
Power plugs: Type A / B; 120 V · 60 Hz
Prices: ≈ 43% of US; price level, 2025
GDP per capita: $6,598; 2025
Happiness: 6.5 / 10; World Happiness, 2025
Safe drinking water: 49%; of population, 2024
Homicide rate: 23.4; per 100k, 2023
Road deaths: 22.9; per 100k/yr, 2019
Income group: Upper middle; World Bank
English: Moderate; EF EPI 510
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 Sumpango (14.6462°, -90.7343°, elevation 1,900 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	24	14
2	24	15
3	24	15
4	24	15
5	24	15
6	24	15
7	24	15
8	24	15
9	24	15
10	24	15
11	24	15
12	24	15
13	24	15
14	24	15
15	24	15
16	24	15
17	24	15
18	24	15
19	24	15
20	24	15
21	24	15
22	24	15
23	24	15
24	24	15
25	24	15
26	24	15
27	24	15
28	23	15
29	23	15
30	23	15

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

	Rain chance (%)
1	76
2	77
3	77
4	78
5	78
6	78
7	78
8	78
9	78
10	77
11	77
12	77
13	77
14	78
15	78
16	78
17	79
18	79
19	80
20	80
21	81
22	81
23	82
24	82
25	83
26	83
27	83
28	82
29	82
30	81

	Dry (%)	Comfortable (%)	Humid (%)
1	9	76	15
2	9	76	15
3	9	76	15
4	8	76	16
5	8	76	16
6	8	75	17
7	8	75	17
8	7	75	18
9	7	75	18
10	7	74	19
11	7	73	20
12	7	72	21
13	6	72	22
14	6	71	23
15	6	70	24
16	5	70	25
17	5	70	25
18	5	69	26
19	4	69	27
20	4	68	28
21	3	69	28
22	3	69	28
23	2	69	29
24	2	69	29
25	2	69	29
26	2	69	29
27	2	69	29
28	2	69	29
29	2	69	29
30	2	69	29

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

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

	Rain chance (%)
1	76
2	77
3	77
4	78
5	78
6	78
7	78
8	78
9	78
10	77
11	77
12	77
13	77
14	78
15	78
16	78
17	79
18	79
19	80
20	80
21	81
22	81
23	82
24	82
25	83
26	83
27	83
28	82
29	82
30	81

	Dry (%)	Comfortable (%)	Humid (%)
1	9	76	15
2	9	76	15
3	9	76	15
4	8	76	16
5	8	76	16
6	8	75	17
7	8	75	17
8	7	75	18
9	7	75	18
10	7	74	19
11	7	73	20
12	7	72	21
13	6	72	22
14	6	71	23
15	6	70	24
16	5	70	25
17	5	70	25
18	5	69	26
19	4	69	27
20	4	68	28
21	3	69	28
22	3	69	28
23	2	69	29
24	2	69	29
25	2	69	29
26	2	69	29
27	2	69	29
28	2	69	29
29	2	69	29
30	2	69	29

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

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

	Rain chance (%)
1	76
2	77
3	77
4	78
5	78
6	78
7	78
8	78
9	78
10	77
11	77
12	77
13	77
14	78
15	78
16	78
17	79
18	79
19	80
20	80
21	81
22	81
23	82
24	82
25	83
26	83
27	83
28	82
29	82
30	81

	Dry (%)	Comfortable (%)	Humid (%)
1	9	76	15
2	9	76	15
3	9	76	15
4	8	76	16
5	8	76	16
6	8	75	17
7	8	75	17
8	7	75	18
9	7	75	18
10	7	74	19
11	7	73	20
12	7	72	21
13	6	72	22
14	6	71	23
15	6	70	24
16	5	70	25
17	5	70	25
18	5	69	26
19	4	69	27
20	4	68	28
21	3	69	28
22	3	69	28
23	2	69	29
24	2	69	29
25	2	69	29
26	2	69	29
27	2	69	29
28	2	69	29
29	2	69	29
30	2	69	29