Mata-Utu weather in September

In September, Mata-Utu sees average daytime highs of 27°C and overnight lows near 26°C, with 145 mm of rain across 20.6 wet days and about 11.9 hours of daylight. It is the 10th-warmest and 10th-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 41% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 11 h 42 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Mata-Utu's 3rd-clearest and 4th-windiest month. For the whole year in context, see Mata-Utu's year-round climate.

Daytime high
27°
10th warmest
Overnight low
26°
3rd coldest
Rainfall
145 mm
20.6 wet days
Daylight
11 h 54 min
5:41 AM – 5:37 PM
Cloud cover
52%
3rd clearest
Wind
25 km/h
4th windiest
Solar energy
5.72 kWh/m²
Travel score
5.0
out of 10

Mata-Utu is capital of Wallis and Futuna.

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 27°C through the month.

A typical September day in Mata-Utu reaches about 27°C in the afternoon and slips back to 26°C overnight — a 1°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 28°C. Set against its neighbours, September runs on par with August and on par with October.

24°26°28°30°32°151015202530
Avg high (°C)Avg low (°C)
12726
22726
32726
42726
52726
62726
72726
82726
92726
102726
112726
122726
132726
142726
152726
162726
172726
182726
192726
202726
212726
222726
232726
242726
252726
262726
272726
282726
292726
302726

How September really feels in Mata-Utu

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.

Mata-Utu weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 26°35526.212.73.7
Feb28° / 26°33023.612.43.7
Mar28° / 26°30425.812.13.7
Apr28° / 26°23424.311.73.9
May28° / 26°18121.711.44.6
Jun28° / 26°14519.611.25.0
Jul27° / 26°12218.711.35.4
Aug27° / 26°11619.211.65.3
Sep27° / 26°14520.611.95.0
Oct27° / 26°21723.212.34.5
Nov28° / 26°26124.212.64.2
Dec28° / 26°32425.412.84.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 41% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 20% of September, with mostly cloudy or overcast conditions the remaining 39%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16733
26733
36733
46733
56733
66733
76733
86733
96634
106535
116535
126436
136337
146238
156139
166040
176040
185941
195842
205842
215743
225743
235644
245644
255545
265545
275446
285347
295248
305248

Chance of precipitation in September

Any precipitation

Mata-Utu gets around 145 mm of rain over 20.6 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 67% and peaks near 71% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
162
262
363
463
564
664
765
865
966
1066
1166
1267
1367
1468
1568
1668
1769
1869
1969
2070
2170
2270
2370
2471
2570
2670
2770
2870
2970
3070

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the oppressive band about 81% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
118829
2188110
3178210
4178210
5178111
6068311
7068212
8058312
9058213
10048214
11048214
12048115
13038215
14038215
15038116
16038116
17028216
18028216
19028216
20028216
21028216
22038116
23038116
24038116
25038116
26048016
27048016
28048016
29048016
30048016

Wind in September

Winds average 25 km/h in September.

Across September, daily wind ranges from about 24 km/h on the calmest days to 26 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202530
Wind speed (km/h)Feels
126breezy
226breezy
326breezy
426breezy
526breezy
626breezy
726breezy
826breezy
926breezy
1026breezy
1126breezy
1225breezy
1325breezy
1425breezy
1525breezy
1625breezy
1725breezy
1825breezy
1925breezy
2025breezy
2125breezy
2225breezy
2324breezy
2424breezy
2524breezy
2624breezy
2724breezy
2824breezy
2924breezy
3024breezy

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 42 min at the start of September to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 24 minutes over September. Sunrise moves from 5:52 AM to 5:31 AM, and sunset from 5:37 PM to 5:37 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.75:525:37
211.85:525:37
311.85:515:37
411.85:505:37
511.85:495:37
611.85:495:37
711.85:485:37
811.85:475:37
911.85:465:37
1011.95:465:37
1111.95:455:37
1211.95:445:37
1311.95:435:37
1411.95:435:37
1511.95:425:37
1611.95:415:37
1711.95:405:37
1812.05:405:37
1912.05:395:37
2012.05:385:37
2112.05:375:37
2212.05:375:37
2312.05:365:37
2412.05:355:37
2512.05:345:37
2612.15:345:37
2712.15:335:37
2812.15:325:37
2912.15:325:37
3012.15:315:37

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.72 kWh/m².

For context, solar energy here swings from a low near 4.29 kWh/m² to a high of 5.97 kWh/m² in November across the year — September's 5.72 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.5Bright
55.5Bright
65.5Bright
75.6Bright
85.6Bright
95.6Bright
105.6Bright
115.7Bright
125.7Bright
135.7Bright
145.7Bright
155.7Bright
165.7Bright
175.8Bright
185.8Bright
195.8Bright
205.8Bright
215.8Bright
225.8Bright
235.8Bright
245.9Bright
255.9Bright
265.9Bright
275.9Bright
285.9Bright
295.9Bright
305.9Bright
Planning a trip in September

Is September a good time to visit Mata-Utu?

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

5.0
Sightseeing
3rd-best month of the year
5.2
Beach & pool
4th-best month of the year

September is a reasonable time to visit Mata-Utu for sightseeing.

What to pack for Mata-Utu in September

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

In September, Mata-Utu sees daytime highs around 27°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection and a windbreaker. About 21 days see rain.

light clothesrain gearsun protectiona windbreaker

Sea temperature near Mata-Utu in September

The nearest coast averages about 28°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in March at about 29°C and coldest in August near 28°C.

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

26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan29Tropical
Feb29Tropical
Mar29Tropical
Apr29Tropical
May29Tropical
Jun29Tropical
Jul28Tropical
Aug28Tropical
Sep28Tropical
Oct28Tropical
Nov29Tropical
Dec29Tropical

UV index in Mata-Utu in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 14 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Mata-Utu peaks around February 14 at about 17 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 18 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 14UV 17Jun 18UV 9
UV index (midday)Level
Jan16Extreme
Feb17Extreme
Mar16Extreme
Apr13Extreme
May10Extreme
Jun9Very high
Jul10Very high
Aug11Extreme
Sep14Extreme
Oct15Extreme
Nov13Extreme
Dec13Extreme
Location & terrain

Where is Mata-Utu?

Mata-Utu sits at 13.3°S, 176.2°W, 15 m above sea level, in Wallis and Futuna. The nearest listed city is Apia, 480 km away.

Topography around Mata-Utu

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

Within 3 km, the terrain around Mata-Utu has only modest variations in elevation — a maximum elevation change of 142 m around an average of 28 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 147 m; within 80 km, only modest variations in elevation — a maximum elevation change of 141 m.

The land around Mata-Utu is covered by trees (46%) and water (46%) within 3 km, water (91%) within 16 km, and water (98%) within 80 km.

3 km
142 m
16 km
147 m
80 km
141 m
treesgrasslandartificial surfaceswaterwetland
September weather nearby: Apia 480 km · Labasa 594 km · Pago Pago 601 km · Levuka 718 km · Funafuti 732 km · Nasinu 779 km · Lami 790 km · Suva 791 km

Wallis and Futuna travel facts

Religion
Roman Catholic 99%other 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 Mata-Utu (-13.2816°, -176.1745°, elevation 15 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).