Sayaxché weather in September

In September, Sayaxché sees average daytime highs of 32°C and overnight lows near 23°C, with 302 mm of rain across 28.2 wet days and about 12.1 hours of daylight. It is the 7th-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 32°C through the month. The sky is clear or mostly clear about 7% of the time in September, and the air most often feels miserable.

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

Daytime high
32°
7th warmest
Overnight low
23°
10th coldest
Rainfall
302 mm
28.2 wet days
Daylight
12 h 06 min
5:52 AM – 5:58 PM
Cloud cover
77%
11th clearest
Wind
4 km/h
12th windiest
Solar energy
5.03 kWh/m²
Travel score
2.3
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 32°C through the month.

A typical September day in Sayaxché reaches about 32°C in the afternoon and slips back to 23°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 34°C. Set against its neighbours, September runs on par with August and about 2°C warmer than October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13223
23223
33223
43223
53223
63223
73223
83223
93223
103223
113223
123223
133223
143223
153223
163223
173223
183223
193223
203223
213223
223223
233223
243223
253123
263123
273123
283123
293123
303123

How September really feels in Sayaxché

Once humidity and wind are folded in, September averages 30 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
30
5 feel dangerously hot (≥ 39°C)
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Sayaxché weather by month

How September compares with the rest of the year at a glance. September is the 7th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 19°5210.511.16.4
Feb30° / 20°257.111.45.6
Mar33° / 21°366.911.94.1
Apr36° / 23°526.712.42.5
May35° / 24°15115.612.82.0
Jun33° / 24°29025.9132.2
Jul32° / 23°20825.312.92.6
Aug32° / 23°26026.812.62.4
Sep32° / 23°30228.212.12.3
Oct30° / 22°23623.311.63.3
Nov28° / 21°1051611.25.0
Dec28° / 19°6012.5116.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 7% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 75%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12872
22773
32872
42872
52872
62773
72773
82773
92773
102674
112674
122575
132476
142476
152575
162476
172476
182476
192377
202377
212377
222278
232278
242278
252278
262278
272278
282377
292377
302377

Chance of precipitation in September

Any precipitation

Sayaxché gets around 302 mm of rain over 28.2 wet days in September, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 93% and peaks near 95% on the wettest days.

0%20%40%60%80%100%151015202530
Rain chance (%)
192
292
392
493
593
693
794
894
994
1094
1194
1295
1395
1495
1595
1695
1795
1895
1994
2094
2194
2294
2394
2493
2593
2693
2792
2892
2991
3090

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the miserable band about 56% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
104060
204159
304159
404159
504159
604258
704258
804258
904258
1004357
1104357
1204357
1304357
1404357
1504456
1604456
1704456
1804456
1904456
2004456
2104555
2204555
2304555
2404654
2504654
2614752
2714752
2814752
2924850
3024850

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.

0246810151015202530
Wind speed (km/h)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm

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 5:51 AM to 5:54 AM, and sunset from 6:10 PM to 5:46 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:516:10
212.35:516:09
312.35:516:09
412.35:516:08
512.35:516:07
612.25:516:06
712.25:516:05
812.25:516:05
912.25:526:04
1012.25:526:03
1112.25:526:02
1212.25:526:01
1312.15:526:00
1412.15:526:00
1512.15:525:59
1612.15:525:58
1712.15:525:57
1812.15:535:56
1912.05:535:55
2012.05:535:54
2112.05:535:54
2212.05:535:53
2312.05:535:52
2412.05:535:51
2511.95:535:50
2611.95:535:49
2711.95:545:49
2811.95:545:48
2911.95:545:47
3011.95:545:46

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.03 kWh/m².

For context, solar energy here swings from a low near 3.59 kWh/m² to a high of 6.22 kWh/m² in April across the year — September's 5.03 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.4Bright
25.4Bright
35.4Bright
45.4Bright
55.4Bright
65.3Bright
75.3Bright
85.3Bright
95.3Bright
105.3Bright
115.2Bright
125.2Bright
135.2Bright
145.1Bright
155.1Bright
165.0Bright
175.0Bright
185.0Bright
194.9Bright
204.9Bright
214.8Bright
224.8Bright
234.8Bright
244.7Bright
254.7Bright
264.7Bright
274.6Bright
284.6Bright
294.6Bright
304.5Bright
Planning a trip in September

Hazard calendar for Sayaxché

In seasonPeak

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

Sayaxché's rainy season runs May–October, 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 Sayaxché?

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

2.3
Sightseeing
10th-best month of the year
3.6
Beach & pool
12th-best month of the year

September is a weaker month for outdoor sightseeing in Sayaxché.

What to pack for Sayaxché in September

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

In September, Sayaxché sees daytime highs around 32°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 28 days see rain.

light clothesrain gearsun protection

UV index in Sayaxché in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Sayaxché peaks around April 10 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeExtremeVery highApr 10UV 13Dec 16UV 8
UV index (midday)Level
Jan9Very high
Feb12Extreme
Mar13Extreme
Apr13Extreme
May10Very high
Jun13Extreme
Jul12Extreme
Aug12Extreme
Sep12Extreme
Oct11Extreme
Nov8Very high
Dec8Very high

Air quality in Sayaxché 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 Sayaxché is worst in April — around 43 µg/m³ PM2.5 (poor), about 6.4× the cleanest month (December, 7 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecGoodModeratePoorModerateGoodApr 2042 µg/m³Dec 197 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb9Good
Mar16Moderate
Apr43Poor
May36Poor
Jun25Moderate
Jul25Moderate
Aug18Moderate
Sep15Moderate
Oct11Good
Nov8Good
Dec7Good
Location & terrain

Where is Sayaxché?

Sayaxché sits at 16.5°N, 90.2°W, 0 m above sea level, in Guatemala. The nearest listed city is San Benito, 52 km away.

San BenitoFloresChisecPoptúnSan Pedro CarcháCobánMelchor de MencosSan Cristóbal Verapaz

Topography around Sayaxché

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

Within 3 km, the terrain around Sayaxché has only modest variations in elevation — a maximum elevation change of 65 m around an average of 124 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 139 m; within 80 km, large variations in elevation — a maximum elevation change of 783 m.

The land around Sayaxché is covered by grassland (49%) and trees (42%) within 3 km, grassland (57%) and trees (41%) within 16 km, and grassland (54%) and trees (43%) within 80 km.

3 km
65 m
16 km
139 m
80 km
783 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: San Benito 52 km · Flores 54 km · Chisec 80 km · Poptún 85 km · San Pedro Carchá 117 km · Cobán 119 km · Melchor de Mencos 126 km · San Cristóbal Verapaz 132 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
Evangelical 46%Roman Catholic 42%none 11%

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 Sayaxché (16.5245°, -90.188°, elevation 0 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).