Mirriah weather in September

In September, Mirriah sees average daytime highs of 35°C and overnight lows near 24°C, with 37 mm of rain across 6.6 wet days and about 12.1 hours of daylight. It is the 6th-warmest and 3rd-wettest month of the year here.

Highs climb over the month, from about 33°C in the first days to 37°C by the end. The sky is clear or mostly clear about 46% of the time in September, and the air most often feels oppressive.

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 Mirriah's 10th-clearest and 12th-windiest month. For the whole year in context, see Mirriah's year-round climate.

Daytime high
35°
6th warmest
Overnight low
24°
8th coldest
Rainfall
37 mm
6.6 wet days
Daylight
12 h 06 min
6:15 AM – 6:20 PM
Cloud cover
47%
10th clearest
Wind
10 km/h
12th windiest
Solar energy
6.45 kWh/m²
Travel score
2.8
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 33°C in the first days to 37°C by the end.

A typical September day in Mirriah reaches about 35°C in the afternoon and slips back to 24°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 32°C and 38°C. Set against its neighbours, September runs about 3°C warmer than August and about 2°C cooler than October.

20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13324
23324
33324
43324
53324
63324
73424
83424
93424
103424
113424
123424
133524
143524
153524
163524
173524
183524
193524
203624
213624
223624
233624
243624
253624
263624
273624
283724
293724
303724

How September really feels in Mirriah

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
heat index over the day's high
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.

Mirriah weather by month

How September compares with the rest of the year at a glance. September is the 6th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 14°0011.37.1
Feb33° / 17°0011.54.9
Mar37° / 21°0011.92.1
Apr40° / 25°10.312.30.2
May40° / 27°61.912.60.1
Jun38° / 27°154.212.81.1
Jul34° / 25°7313.112.72.6
Aug32° / 24°13516.512.53.3
Sep35° / 24°376.612.12.8
Oct37° / 23°40.911.72.1
Nov34° / 19°0011.43.9
Dec30° / 15°0011.26.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 46% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 19% of September, with mostly cloudy or overcast conditions the remaining 35%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14951
25149
35149
45347
55446
65545
75644
85743
95941
105941
116139
126238
136337
146535
156634
166733
176832
187030
197129
207228
217327
227426
237525
247624
257525
267624
277624
287624
297723
307723

Chance of precipitation in September

Any precipitation

Mirriah gets around 37 mm of rain over 6.6 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 23% and peaks near 42% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
142
241
339
438
536
634
733
832
930
1029
1128
1227
1326
1425
1524
1623
1721
1820
1919
2017
2116
2215
2314
2413
2512
2611
2710
289
299
308

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 42% of days. Sticky, muggy-or-worse air turns up on roughly 79% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
10002278
20012376
30012574
40012772
50022870
60023068
70033166
81043362
91043461
101153657
111163755
122173852
132283949
142294046
1532104144
1633114141
1744124238
1855134235
1965144332
2076154329
2187164326
2298174323
23109184221
241210184218
251311194116
261511194114
271712204012
281912203910
29211320379
30231320368

Wind in September

Winds average 10 km/h in September, the calmest month.

Across September, daily wind ranges from about 10 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm

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 6:15 AM to 6:16 AM, and sunset from 6:31 PM to 6:09 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.36:156:31
212.36:156:30
312.26:156:30
412.26:156:29
512.26:156:28
612.26:156:28
712.26:156:27
812.26:156:26
912.26:156:25
1012.26:156:25
1112.16:156:24
1212.16:156:23
1312.16:156:22
1412.16:156:22
1512.16:156:21
1612.16:156:20
1712.16:156:19
1812.06:166:18
1912.06:166:18
2012.06:166:17
2112.06:166:16
2212.06:166:15
2312.06:166:15
2412.06:166:14
2512.06:166:13
2611.96:166:12
2711.96:166:12
2811.96:166:11
2911.96:166:10
3011.96:166:09

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.45 kWh/m².

For context, solar energy here swings from a low near 5.79 kWh/m² to a high of 7.46 kWh/m² in April across the year — September's 6.45 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.2Intense
26.2Intense
36.2Intense
46.2Intense
56.3Intense
66.3Intense
76.3Intense
86.3Intense
96.3Intense
106.4Intense
116.4Intense
126.4Intense
136.4Intense
146.4Intense
156.4Intense
166.5Intense
176.5Intense
186.5Intense
196.5Intense
206.5Intense
216.5Intense
226.5Intense
236.5Intense
246.5Intense
256.5Intense
266.5Intense
276.5Intense
286.5Intense
296.5Intense
306.5Intense
Planning a trip in September

Hazard calendar for Mirriah

In seasonPeak

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

Mirriah sees dust haze year-round, heaviest in April.

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

Is September a good time to visit Mirriah?

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

2.8
Sightseeing
6th-best month of the year
5.8
Beach & pool
5th-best month of the year

September is a weaker month for outdoor sightseeing in Mirriah.

What to pack for Mirriah in September

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

In September, Mirriah sees daytime highs around 35°C and nights near 24°C. Pack light clothes and sun protection. About 7 days see rain.

light clothessun protection

UV index in Mirriah 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 Mirriah peaks around August 14 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 7 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highExtremeVery highAug 14UV 12Dec 17UV 7
UV index (midday)Level
Jan9Very high
Feb12Extreme
Mar11Extreme
Apr12Extreme
May9Very high
Jun10Extreme
Jul12Extreme
Aug13Extreme
Sep12Extreme
Oct11Extreme
Nov9Very high
Dec7Very high

Air quality in Mirriah 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 Mirriah is worst in February — around 103 µg/m³ PM2.5 (unhealthy), about 3.9× the cleanest month (August, 26 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorModeratePoorUnhealthyFeb 13102 µg/m³Aug 1627 µg/m³
PM2.5 (µg/m³)Level
Jan98Unhealthy
Feb103Unhealthy
Mar96Unhealthy
Apr81Unhealthy
May63Unhealthy
Jun54Poor
Jul35Moderate
Aug26Moderate
Sep35Poor
Oct57Unhealthy
Nov65Unhealthy
Dec91Unhealthy
Location & terrain

Where is Mirriah?

Mirriah sits at 13.7°N, 9.2°E, 407 m above sea level, in Niger. The nearest listed city is Zinder, 21 km away.

DauraGumelGouréTessaouaGazaoua

Topography around Mirriah

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

Within 3 km, the terrain around Mirriah has only modest variations in elevation — a maximum elevation change of 47 m around an average of 413 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 147 m; within 80 km, significant variations in elevation — a maximum elevation change of 287 m.

The land around Mirriah is covered by grassland (60%) and cropland (30%) within 3 km, cropland (50%) and grassland (47%) within 16 km, and grassland (55%) and cropland (44%) within 80 km.

3 km
47 m
16 km
147 m
80 km
287 m
shrubsgrasslandcroplandartificial surfacesbare terrain
September weather nearby: Zinder 21 km · Matamey 80 km · Magaria 83 km · Daura 117 km · Gumel 123 km · Gouré 125 km · Tessaoua 126 km · Gazaoua 135 km

Niger travel facts

Travel advisory
Level 4
Do Not Travel
Power plugs
Type A / B / C / D / E / F
220 V · 50 Hz
Prices
≈ 36% of US
price level, 2025
GDP per capita
$775
2025
Happiness
4.9 / 10
World Happiness, 2025
Homicide rate
4.4
per 100k, 2012
Road deaths
25.5
per 100k/yr, 2019
Income group
Low
World Bank
Religion
Muslim 96%ethnic religionist 4%Christian 0%agnostics and other 0%

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 Mirriah (13.7073°, 9.1501°, elevation 407 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).