Guasave weather in September

In September, Guasave sees average daytime highs of 34°C and overnight lows near 26°C, with 113 mm of rain across 13.1 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 34°C through the month. The sky is clear or mostly clear about 45% of the time in September, and the air most often feels miserable.

Daylight stretches from about 12 h 30 min at the start of September to 11 h 48 min by month's end. Set against the rest of the year, September is Guasave's 10th-clearest and 11th-windiest month. For the whole year in context, see Guasave's year-round climate.

Daytime high
34°
4th warmest
Overnight low
26°
10th coldest
Rainfall
113 mm
13.1 wet days
Daylight
12 h 06 min
6:04 AM – 6:13 PM
Cloud cover
50%
10th clearest
Wind
7 km/h
11th windiest
Solar energy
5.37 kWh/m²
Travel score
2.7
out of 10

Guasave is municipal seat of Guasave, State of Sinaloa, Mexico.

Founded
1595

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 34°C through the month.

A typical September day in Guasave reaches about 34°C in the afternoon and slips back to 26°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 31°C and 37°C. Set against its neighbours, September runs on par with August and on par with October.

20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13426
23426
33426
43426
53426
63426
73426
83426
93426
103426
113426
123426
133426
143426
153426
163426
173426
183426
193426
203426
213426
223426
233526
243525
253525
263525
273525
283525
293525
303525

How September really feels in Guasave

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
30 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.

Guasave weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 13°151.610.68.2
Feb27° / 13°141.611.18.1
Mar29° / 14°30.411.87.4
Apr31° / 16°10.312.66.1
May33° / 19°10.113.24.9
Jun34° / 24°6113.63.8
Jul35° / 27°701013.42.5
Aug35° / 27°11415.512.92.2
Sep34° / 26°11313.112.22.7
Oct34° / 23°333.411.43.5
Nov31° / 17°312.210.85.6
Dec27° / 13°151.910.47.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 45% 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 38%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14258
24357
34555
44654
54852
64951
74951
85149
95347
105446
115644
125842
135941
146040
156238
166337
176436
186535
196733
206832
217030
227129
237228
247327
257525
267624
277822
287921
298119
308119

Chance of precipitation in September

Any precipitation

Guasave gets around 113 mm of rain over 13.1 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 43% and peaks near 56% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
156
256
356
455
555
654
753
853
952
1051
1151
1250
1349
1448
1547
1645
1744
1842
1941
2039
2138
2236
2334
2432
2530
2629
2727
2825
2923
3022

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 90% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
100298
200298
300298
400298
500298
600397
700397
800397
900397
1000496
1100496
1200496
1300595
1400595
1500694
1601792
1701792
1801891
1901990
20021088
21021187
22021286
23021385
24031582
25031681
26031780
27141877
28142075
29152173
30162271

Wind in September

Winds average 7 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 30 min at the start of September to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 42 minutes over September. Sunrise moves from 5:58 AM to 6:10 AM, and sunset from 6:29 PM to 5:57 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.55:586:29
212.55:586:28
312.55:596:27
412.55:596:26
512.45:596:25
612.46:006:24
712.46:006:23
812.46:016:22
912.36:016:21
1012.36:016:19
1112.36:026:18
1212.36:026:17
1312.26:036:16
1412.26:036:15
1512.26:036:14
1612.16:046:13
1712.16:046:11
1812.16:056:10
1912.16:056:09
2012.06:056:08
2112.06:066:07
2212.06:066:06
2312.06:076:05
2411.96:076:04
2511.96:076:02
2611.96:086:01
2711.96:086:00
2811.86:095:59
2911.86:095:58
3011.86:105:57

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.37 kWh/m².

For context, solar energy here swings from a low near 4.09 kWh/m² to a high of 7.93 kWh/m² in May across the year — September's 5.37 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.4Bright
25.4Bright
35.4Bright
45.3Bright
55.3Bright
65.3Bright
75.3Bright
85.3Bright
95.3Bright
105.3Bright
115.3Bright
125.3Bright
135.3Bright
145.4Bright
155.4Bright
165.4Bright
175.4Bright
185.4Bright
195.4Bright
205.4Bright
215.4Bright
225.4Bright
235.5Bright
245.5Bright
255.5Bright
265.5Bright
275.5Bright
285.5Bright
295.5Bright
305.5Bright
Planning a trip in September

Hazard calendar for Guasave

In seasonPeak

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

Guasave sits in the eastern Pacific hurricane zone; the season peaks August–September.

Pacific hurricane
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Guasave?

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

2.7
Sightseeing
10th-best month of the year
5.5
Beach & pool
10th-best month of the year

September is a weaker month for outdoor sightseeing in Guasave.

What to pack for Guasave in September

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

In September, Guasave sees daytime highs around 34°C and nights near 26°C. Pack light clothes. Worth having: rain gear and sun protection. About 13 days see rain.

light clothesrain gearsun protection

Sea temperature near Guasave in September

The nearest coast averages about 30°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 27 km away) is warmest in August at about 30°C and coldest in February near 20°C.

It's comfortable for a long swim from Mar 17 to Jan 13 — about 10 months when the water holds above 20°C.

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan20Cool
Feb20Cool
Mar20Cool
Apr22Refreshing
May25Warm
Jun28Warm
Jul30Tropical
Aug30Tropical
Sep30Tropical
Oct29Tropical
Nov25Warm
Dec22Refreshing

UV index in Guasave in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Guasave peaks around July 17 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 5 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highHighJul 17UV 12Dec 19UV 5
UV index (midday)Level
Jan5High
Feb7High
Mar9Very high
Apr11Extreme
May12Extreme
Jun11Extreme
Jul12Extreme
Aug11Extreme
Sep11Extreme
Oct8Very high
Nov6High
Dec5Moderate
Location & terrain

Where is Guasave?

Guasave sits at 25.6°N, 108.5°W, 19 m above sea level, in Mexico. The nearest listed city is Gabriel Leyva Solano, 20 km away.

Topography around Guasave

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

Within 3 km, the terrain around Guasave has only modest variations in elevation — a maximum elevation change of 19 m around an average of 17 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 34 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,603 m.

The land around Guasave is covered by artificial surfaces (47%) and cropland (28%) within 3 km, cropland (82%) within 16 km, and cropland (30%), water (26%) and trees (24%) within 80 km.

3 km
19 m
16 km
34 m
80 km
1,603 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwatermangroves
September weather nearby: Gabriel Leyva Solano 20 km · Guamúchil 41 km · Juan José Ríos 41 km · Los Mochis 59 km · Navolato 118 km · Licenciado Benito Juárez 138 km · Culiacán 138 km · Costa Rica 154 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
Catholic 78%no religion 11%other Evangelical Churches 8%Jehovah Witness 1%

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 Guasave (25.5679°, -108.4695°, elevation 19 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).