Saint-Chamond weather in September

In September, Saint-Chamond sees average daytime highs of 20°C and overnight lows near 10°C, with 90 mm of rain across 9.5 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 22°C in the first days to 18°C by the end. The sky is clear or mostly clear about 30% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 06 min at the start of September to 11 h 30 min by month's end. Set against the rest of the year, September is Saint-Chamond's 3rd-clearest and 10th-windiest month. For the whole year in context, see Saint-Chamond's year-round climate.

Daytime high
20°
4th warmest
Overnight low
10°
9th coldest
Rainfall
90 mm
9.5 wet days
Daylight
12 h 18 min
6:27 AM – 6:46 PM
Cloud cover
57%
3rd clearest
Wind
9 km/h
10th windiest
Solar energy
3.96 kWh/m²
Travel score
6.4
out of 10
Air quality
Good
PM2.5 8.2 µg/m³ · 2019

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 22°C in the first days to 18°C by the end.

A typical September day in Saint-Chamond reaches about 20°C in the afternoon and slips back to 10°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 26°C. Set against its neighbours, September runs about 5°C cooler than August and about 5°C warmer than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
12312
22312
32312
42212
52211
62211
72211
82211
92211
102111
112111
122111
132111
142110
152110
162010
172010
182010
192010
202010
212010
221910
231910
24199
25199
26199
27199
28189
29189
30189

How September really feels in Saint-Chamond

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.

Saint-Chamond weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -0°6312.24.48.90.3
Feb / -0°499.9410.11.0
Mar11° / 5511.31.811.62.9
Apr15° / 8612.51.113.24.1
May19° / 9813.50.114.75.4
Jun23° / 12°8912.4015.46.4
Jul25° / 14°8310.4015.16.9
Aug25° / 14°779.7013.97.1
Sep20° / 10°909.5012.36.4
Oct16° / 9511.50.310.74.6
Nov10° / 9412.31.99.32.0
Dec / 6411.53.18.60.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% 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 53%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15248
25248
35347
45248
55248
65248
75248
85149
95248
105149
115149
124951
134951
144852
154852
164753
174753
184555
194456
204456
214456
224357
234258
244258
254258
264159
274060
283862
293763
303763

Chance of precipitation in September

Any precipitation

Saint-Chamond gets around 90 mm of rain over 9.5 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 32% and peaks near 37% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
127
227
327
427
528
628
728
829
929
1030
1130
1231
1332
1433
1533
1634
1734
1834
1935
2035
2135
2235
2335
2435
2536
2636
2736
2837
2937
3037

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 79% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
164279
266268
366268
468257
569256
670246
771245
873234
973234
1075223
1176213
1276213
1378202
1478202
1579192
1681181
1782171
1883161
1983161
2084151
2185141
2286131
2386131
2486131
2586131
2687121
2787121
2887121
2987121
3087121

Wind in September

Winds average 9 km/h in September.

Across September, daily wind ranges from about 9 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 06 min at the start of September to 11 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 96 minutes over September. Sunrise moves from 6:08 AM to 6:45 AM, and sunset from 7:15 PM to 6:18 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.16:087:15
213.16:097:13
313.06:107:11
413.06:127:10
512.96:137:08
612.96:147:06
712.86:167:04
812.76:177:02
912.76:187:00
1012.66:196:58
1112.66:216:56
1212.56:226:54
1312.56:236:52
1412.46:246:50
1512.46:266:48
1612.36:276:46
1712.36:286:44
1812.26:296:42
1912.26:316:40
2012.16:326:38
2112.06:336:36
2212.06:346:34
2311.96:366:32
2411.96:376:30
2511.86:386:28
2611.86:406:26
2711.76:416:24
2811.76:426:22
2911.66:436:20
3011.56:456:18

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.96 kWh/m².

For context, solar energy here swings from a low near 1.14 kWh/m² to a high of 6.19 kWh/m² in July across the year — September's 3.96 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.6Bright
44.6Bright
54.5Bright
64.5Bright
74.4Bright
84.4Bright
94.3Bright
104.3Bright
114.2Bright
124.2Bright
134.1Bright
144.0Bright
154.0Moderate
163.9Moderate
173.9Moderate
183.8Moderate
193.8Moderate
203.7Moderate
213.6Moderate
223.6Moderate
233.5Moderate
243.5Moderate
253.4Moderate
263.4Moderate
273.3Moderate
283.3Moderate
293.2Moderate
303.1Moderate
Planning a trip in September

Is September a good time to visit Saint-Chamond?

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

6.4
Sightseeing
3rd-best month of the year
3.6
Beach & pool
4th-best month of the year

September is a reasonable time to visit Saint-Chamond for sightseeing.

What to pack for Saint-Chamond in September

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

In September, Saint-Chamond sees daytime highs around 20°C and nights near 10°C. Worth packing: rain gear. About 10 days see rain.

rain gear

UV index in Saint-Chamond in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Saint-Chamond peaks around July 15 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 15UV 9Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr6High
May7High
Jun7Very high
Jul9Very high
Aug7High
Sep5Moderate
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Saint-Chamond?

Saint-Chamond sits at 45.5°N, 4.5°E, 372 m above sea level, in France. The nearest listed city is Saint-Étienne, 11 km away.

Topography around Saint-Chamond

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

Within 3 km, the terrain around Saint-Chamond has significant variations in elevation — a maximum elevation change of 377 m around an average of 434 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,237 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,639 m.

The land around Saint-Chamond is covered by grassland (35%), trees (30%) and artificial surfaces (24%) within 3 km, trees (48%) and grassland (35%) within 16 km, and trees (46%) and grassland (33%) within 80 km.

3 km
377 m
16 km
1,237 m
80 km
1,639 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Saint-Étienne 11 km · Firminy 20 km · Givors 24 km · Vienne 29 km · Annonay 29 km · Saint-Genis-Laval 33 km · Oullins 35 km · Sainte-Foy-lès-Lyon 36 km

France travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / E
230 V · 50 Hz
Prices
≈ 77% of US
price level, 2025
GDP per capita
$48,986
2025
Happiness
6.6 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
1.3
per 100k, 2023
Road deaths
5.1
per 100k/yr, 2019
Income group
High
World Bank
English
Moderate
EF EPI 539
Religion
Roman Catholic 47%none 33%Muslim 4%Protestant 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 Saint-Chamond (45.4759°, 4.5129°, elevation 372 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).