Jomvu weather in September

In September, Jomvu sees average daytime highs of 28°C and overnight lows near 22°C, with 38 mm of rain across 14.5 wet days and about 12 hours of daylight. It is the 9th-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 51% of the time in September, and the air most often feels muggy.

Daylight stretches from about 11 h 54 min at the start of September to 12 hours by month's end. Set against the rest of the year, September is Jomvu's 1st-clearest and 5th-windiest month. For the whole year in context, see Jomvu's year-round climate.

Daytime high
28°
9th warmest
Overnight low
22°
3rd coldest
Rainfall
38 mm
14.5 wet days
Daylight
12 hours
6:17 AM – 6:15 PM
Cloud cover
43%
1st clearest
Wind
13 km/h
5th windiest
Solar energy
5.75 kWh/m²
Travel score
5.5
out of 10

Jomvu is place in Coast Province, Kenya.

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 28°C through the month.

A typical September day in Jomvu reaches about 28°C in the afternoon and slips back to 22°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 29°C. Set against its neighbours, September runs about 1°C warmer than August and about 1°C cooler than October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12821
22821
32821
42821
52821
62821
72821
82821
92821
102821
112821
122822
132822
142822
152822
162822
172822
182822
192922
202922
212922
222922
232922
242922
252922
262922
272922
282922
292922
302922

How September really feels in Jomvu

Once humidity and wind are folded in, September averages 0 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
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Jomvu weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 24°285.712.24.4
Feb33° / 24°204.312.14.1
Mar33° / 25°6315.5123.3
Apr31° / 24°10822.811.93.3
May29° / 23°15520.411.84.4
Jun28° / 22°5915.811.85.4
Jul27° / 21°461511.85.8
Aug27° / 21°4015.111.95.8
Sep28° / 22°3814.5125.5
Oct30° / 23°6915.512.14.7
Nov30° / 23°8319.512.23.8
Dec31° / 24°701712.23.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 51% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 30% of September, with mostly cloudy or overcast conditions the remaining 19%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17921
28020
38119
48218
58218
68218
78317
88317
98317
108317
118317
128317
138317
148317
158218
168218
178218
188218
198119
208119
218119
228020
238020
247921
257822
267822
277723
287723
297723
307624

Chance of precipitation in September

Any precipitation

Jomvu gets around 38 mm of rain over 14.5 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 48% and peaks near 51% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
151
251
351
451
551
650
750
850
949
1049
1148
1248
1348
1448
1547
1647
1747
1847
1946
2046
2146
2246
2346
2446
2546
2646
2746
2846
2946
3047

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 76% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)
118712
218613
318613
418514
518415
618316
718316
818217
918217
1018118
1118118
1218019
1317920
1417920
1517821
1617722
1717623
1817524
1917524
2017425
2117227
2217128
2317029
2416930
2516732
2616633
2716435
2816237
2916039
3015940

Wind in September

Winds average 13 km/h in September.

Across September, daily wind ranges from about 12 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2812light breeze
2912light breeze
3012light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 54 min 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 6 minutes over September. Sunrise moves from 6:24 AM to 6:10 AM, and sunset from 6:19 PM to 6:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.96:246:19
211.96:236:19
311.96:236:19
411.96:226:18
511.96:226:18
611.96:216:18
711.96:216:18
811.96:206:17
912.06:206:17
1012.06:196:17
1112.06:196:17
1212.06:186:16
1312.06:186:16
1412.06:186:16
1512.06:176:16
1612.06:176:15
1712.06:166:15
1812.06:166:15
1912.06:156:14
2012.06:156:14
2112.06:146:14
2212.06:146:14
2312.06:136:13
2412.06:136:13
2512.06:126:13
2612.06:126:13
2712.06:116:12
2812.06:116:12
2912.06:106:12
3012.06:106:12

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.75 kWh/m².

For context, solar energy here swings from a low near 4.52 kWh/m² to a high of 6.42 kWh/m² in February across the year — September's 5.75 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.6Bright
45.6Bright
55.6Bright
65.6Bright
75.6Bright
85.7Bright
95.7Bright
105.7Bright
115.7Bright
125.7Bright
135.7Bright
145.7Bright
155.7Bright
165.8Bright
175.8Bright
185.8Bright
195.8Bright
205.8Bright
215.8Bright
225.8Bright
235.8Bright
245.8Bright
255.8Bright
265.8Bright
275.8Bright
285.9Bright
295.9Bright
305.9Bright
Planning a trip in September

Is September a good time to visit Jomvu?

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

5.5
Sightseeing
3rd-best month of the year
6.4
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Jomvu for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Jomvu in September

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

In September, Jomvu sees daytime highs around 28°C and nights near 22°C. Pack light clothes and rain gear. Worth having: sun protection. About 15 days see rain.

light clothesrain gearsun protection

Sea temperature near Jomvu in September

The nearest coast averages about 26°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 16 km away) is warmest in April at about 29°C and coldest in August near 25°C.

The water stays above 20°C all year — warm enough for a swim any month.

24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan28Warm
Feb28Warm
Mar29Tropical
Apr29Tropical
May28Warm
Jun27Warm
Jul26Warm
Aug25Warm
Sep26Warm
Oct27Warm
Nov28Warm
Dec28Tropical

UV index in Jomvu 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 Jomvu peaks around March 19 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 18 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeMar 19UV 15Jun 18UV 10
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar15Extreme
Apr14Extreme
May11Extreme
Jun9Very high
Jul10Extreme
Aug11Extreme
Sep13Extreme
Oct13Extreme
Nov12Extreme
Dec12Extreme

Air quality in Jomvu 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 Jomvu is worst in December — around 21 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateDec 2421 µg/m³Oct 1313 µg/m³
PM2.5 (µg/m³)Level
Jan21Moderate
Feb19Moderate
Mar17Moderate
Apr14Moderate
May14Moderate
Jun16Moderate
Jul17Moderate
Aug15Moderate
Sep14Moderate
Oct13Moderate
Nov15Moderate
Dec21Moderate
Location & terrain

Where is Jomvu?

Jomvu sits at 4.0°S, 39.6°E, 21 m above sea level, in Kenya. The nearest listed city is Mazeras, 7.0 km away.

Topography around Jomvu

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

Within 3 km, the terrain around Jomvu has only modest variations in elevation — a maximum elevation change of 91 m around an average of 28 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 271 m; within 80 km, large variations in elevation — a maximum elevation change of 778 m.

The land around Jomvu is covered by grassland (39%) and artificial surfaces (21%) within 3 km, grassland (38%) and trees (22%) within 16 km, and water (31%), shrubs (29%) and grassland (23%) within 80 km.

3 km
91 m
16 km
271 m
80 km
778 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetlandmangroves
September weather nearby: Mazeras 7.0 km · Mombasa 10 km · Mtwapa 16 km · Mariakani 20 km · Matuga 21 km · Diani Beach 33 km · Ukunda 34 km · Kilifi 48 km

Kenya travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type G
240 V · 50 Hz
Prices
≈ 34% of US
price level, 2025
GDP per capita
$2,363
2025
Happiness
4.7 / 10
World Happiness, 2025
Homicide rate
4.9
per 100k, 2022
Road deaths
28.3
per 100k/yr, 2019
Income group
Lower middle
World Bank
English
High
EF EPI 593
Religion
Christian 86%Muslim 11%other 2%none 2%

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 Jomvu (-3.9862°, 39.6082°, elevation 21 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. 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. 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).