Athlone weather in September

In September, Athlone sees average daytime highs of 17°C and overnight lows near 12°C, with 51 mm of rain across 8.2 wet days and about 11.8 hours of daylight. It is the 9th-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 17°C through the month. The sky is clear or mostly clear about 43% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 18 min at the start of September to 12 h 18 min by month's end. Set against the rest of the year, September is Athlone's 10th-clearest and 7th-windiest month. For the whole year in context, see Athlone's year-round climate.

Daytime high
17°
9th warmest
Overnight low
12°
4th coldest
Rainfall
51 mm
8.2 wet days
Daylight
11 h 48 min
6:47 AM – 6:34 PM
Cloud cover
47%
10th clearest
Wind
18 km/h
7th windiest
Solar energy
4.88 kWh/m²
Travel score
5.7
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 17°C through the month.

A typical September day in Athlone reaches about 17°C in the afternoon and slips back to 12°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 19°C. Set against its neighbours, September runs about 1°C warmer than August and about 2°C cooler than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
11612
21612
31612
41612
51612
61612
71612
81612
91612
101712
111712
121712
131712
141712
151712
161712
171713
181713
191713
201713
211713
221713
231713
241713
251713
261713
271713
281713
291713
301713

Athlone weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan22° / 18°152.8148.5
Feb22° / 18°14313.38.5
Mar21° / 17°163.312.38.1
Apr20° / 15°435.211.27.2
May18° / 14°678.410.36.3
Jun16° / 12°10811.19.85.2
Jul16° / 11°989.9105.1
Aug16° / 11°8710.310.75.1
Sep17° / 12°518.211.85.7
Oct18° / 14°335.812.96.8
Nov20° / 15°305.113.87.3
Dec21° / 17°173.614.28.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 43% 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 38%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15941
25842
35842
45842
55941
66040
76040
86139
96139
106139
116238
126238
136238
146337
156337
166337
176436
186436
196436
206337
216436
226436
236436
246436
256436
266436
276436
286535
296535
306535

Chance of precipitation in September

Any precipitation

Athlone gets around 51 mm of rain over 8.2 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 27% and peaks near 32% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
132
232
331
431
530
630
729
829
928
1028
1128
1227
1327
1427
1526
1626
1726
1826
1927
2027
2127
2227
2326
2426
2525
2625
2725
2824
2924
3023

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 84% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
1928
2919
3919
4919
5919
69010
78911
88911
98812
108713
118614
128515
138416
148416
158317
168317
178218
188218
198218
208218
218218
228119
238119
248119
258020
268020
277921
287822
297723
307624

Wind in September

Winds average 18 km/h in September.

Across September, daily wind ranges from about 18 km/h on the calmest days to 19 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
118light breeze
218light breeze
318light breeze
418light breeze
518light breeze
618light breeze
718light breeze
818light breeze
918light breeze
1018light breeze
1118light breeze
1218light breeze
1318light breeze
1418light breeze
1518light breeze
1619light breeze
1719light breeze
1819light breeze
1919light breeze
2019light breeze
2119light breeze
2219light breeze
2319light breeze
2419light breeze
2519light breeze
2619light breeze
2719light breeze
2819light breeze
2919light breeze
3019light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 18 min at the start of September to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 60 minutes over September. Sunrise moves from 7:08 AM to 6:26 AM, and sunset from 6:23 PM to 6:44 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.37:086:23
211.37:076:24
311.37:056:25
411.47:046:26
511.47:026:26
611.47:016:27
711.57:006:28
811.56:586:28
911.56:576:29
1011.66:556:30
1111.66:546:31
1211.66:526:31
1311.76:516:32
1411.76:496:33
1511.86:486:33
1611.86:476:34
1711.86:456:35
1811.96:446:35
1911.96:426:36
2011.96:416:37
2112.06:396:38
2212.06:386:38
2312.06:366:39
2412.16:356:40
2512.16:336:41
2612.26:326:41
2712.26:316:42
2812.26:296:43
2912.36:286:44
3012.36:266:44

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.88 kWh/m².

For context, solar energy here swings from a low near 2.48 kWh/m² to a high of 8.24 kWh/m² in December across the year — September's 4.88 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.1Bright
24.2Bright
34.2Bright
44.3Bright
54.3Bright
64.4Bright
74.4Bright
84.5Bright
94.5Bright
104.6Bright
114.7Bright
124.7Bright
134.8Bright
144.8Bright
154.9Bright
164.9Bright
175.0Bright
185.0Bright
195.1Bright
205.1Bright
215.2Bright
225.2Bright
235.3Bright
245.3Bright
255.4Bright
265.4Bright
275.5Bright
285.5Bright
295.6Bright
305.6Bright
Planning a trip in September

Hazard calendar for Athlone

In seasonPeak

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

Athlone's rainy season runs May–September, 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 Athlone?

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

5.7
Sightseeing
9th-best month of the year
1.2
Beach & pool
9th-best month of the year

September is a reasonable time to visit Athlone for sightseeing.

What to pack for Athlone in September

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

In September, Athlone sees daytime highs around 17°C and nights near 12°C. Worth packing: a warm layer, rain gear and sun protection. About 8 days see rain.

a warm layerrain gearsun protection

Sea temperature near Athlone in September

The nearest coast averages about 15°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 January at about 18°C and coldest in August near 15°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

14°16°18°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan18Cool
Feb18Cool
Mar17Cool
Apr16Cool
May15Cool
Jun15Cool
Jul15Bracing
Aug15Bracing
Sep15Bracing
Oct15Cool
Nov16Cool
Dec17Cool

UV index in Athlone in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Athlone peaks around January 13 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateVery highExtremeJan 13UV 13Jun 20UV 3
UV index (midday)Level
Jan13Extreme
Feb10Very high
Mar9Very high
Apr6High
May3Moderate
Jun3Moderate
Jul3Moderate
Aug4Moderate
Sep6High
Oct10Very high
Nov11Extreme
Dec12Extreme

Air quality in Athlone 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 Athlone is worst in May — around 52 µg/m³ PM2.5 (poor), about 3.4× the cleanest month (December, 15 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateMay 2152 µg/m³Dec 1516 µg/m³
PM2.5 (µg/m³)Level
Jan20Moderate
Feb19Moderate
Mar28Moderate
Apr41Poor
May52Poor
Jun50Poor
Jul47Poor
Aug41Poor
Sep33Moderate
Oct29Moderate
Nov18Moderate
Dec15Moderate
Location & terrain

Where is Athlone?

Athlone sits at 34.0°S, 18.5°E, 15 m above sea level, in South Africa. The nearest listed city is Lansdowne, 2.0 km away.

Topography around Athlone

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

Within 3 km, the terrain around Athlone has only modest variations in elevation — a maximum elevation change of 41 m around an average of 15 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,078 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,973 m.

The land around Athlone is covered by artificial surfaces (66%) within 3 km, artificial surfaces (40%) within 16 km, and water (45%) and grassland (21%) within 80 km.

3 km
41 m
16 km
1,078 m
80 km
1,973 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Lansdowne 2.0 km · Rondebosch 2.0 km · Cape Town 9.0 km · Retreat 10 km · Muizenberg 15 km · Kuils River 19 km · Durbanville 20 km · Kraaifontein 24 km

South Africa travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / M / N
230 V · 50 Hz
Prices
≈ 41% of US
price level, 2025
GDP per capita
$6,598
2025
Happiness
5.0 / 10
World Happiness, 2025
Safe drinking water
68%
of population, 2024
Homicide rate
43.7
per 100k, 2022
Road deaths
22.2
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Very high
EF EPI 602
Religion
Christian 86%or other traditional African religions 5%nothing in particular 5%Muslim 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 Athlone (-33.9672°, 18.5021°, 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. 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).