Caterham weather in September

In September, Caterham sees average daytime highs of 18°C and overnight lows near 11°C, with 51 mm of rain across 9.2 wet days and about 12.4 hours of daylight. It is the 4th-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 19°C in the first days to 17°C by the end. The sky is clear or mostly clear about 17% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 24 min at the start of September to 11 h 24 min by month's end. Set against the rest of the year, September is Caterham's 4th-clearest and 9th-windiest month. For the whole year in context, see Caterham's year-round climate.

Daytime high
18°
4th warmest
Overnight low
11°
9th coldest
Rainfall
51 mm
9.2 wet days
Daylight
12 h 24 min
5:43 AM – 6:06 PM
Cloud cover
68%
4th clearest
Wind
13 km/h
9th windiest
Solar energy
3.18 kWh/m²
Travel score
5.8
out of 10

Caterham is town in Tandridge district, Surrey, England.

Density
2,227/km²
people per km²

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 19°C in the first days to 17°C by the end.

A typical September day in Caterham reaches about 18°C in the afternoon and slips back to 11°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 22°C. Set against its neighbours, September runs about 3°C cooler than August and about 4°C warmer than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
12012
22012
32012
41912
51912
61912
71911
81911
91911
101911
111911
121911
131911
141811
151811
161811
171811
181811
191811
201811
211811
221810
231710
241710
251710
261710
271710
281710
291710
301710

How September really feels in Caterham

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.

Caterham weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 6011.40.88.20.9
Feb / 499.419.61.1
Mar10° / 4510.30.511.52.2
Apr13° / 5311.30.213.53.5
May16° / 5710.3015.34.9
Jun19° / 11°6110.4016.35.9
Jul21° / 13°6111.1015.96.3
Aug21° / 13°7010.4014.46.3
Sep18° / 11°519.2012.45.8
Oct14° / 6310.8010.44.1
Nov10° / 6611.60.18.62.2
Dec / 6511.40.87.71.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 17% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 66%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13466
23565
33565
43565
53565
63565
73565
83565
93565
103565
113466
123466
133565
143565
153565
163565
173466
183367
193367
203367
213367
223268
233268
243268
253367
263268
273268
283169
293169
303169

Chance of precipitation in September

Any precipitation

Caterham gets around 51 mm of rain over 9.2 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 31% and peaks near 38% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
126
226
326
425
526
626
726
827
927
1027
1128
1228
1329
1429
1529
1630
1731
1831
1932
2033
2133
2234
2335
2435
2536
2637
2737
2838
2938
3038

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 72% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
163316
264306
365296
466286
567276
668266
768266
869256
970246
1071236
1171236
1272226
1373225
1473225
1574215
1675214
1774224
1875223
1975223
2075232
2174242
2274242
2375241
2474251
2574251
2674251
2775241
2876240
2977230
3078220

Wind in September

Winds average 13 km/h in September.

Across September, daily wind ranges from about 13 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
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 24 min at the start of September to 11 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 120 minutes over September. Sunrise moves from 5:19 AM to 6:06 AM, and sunset from 6:41 PM to 5:33 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.45:196:41
213.35:206:39
313.25:226:37
413.25:246:35
513.15:256:32
613.15:276:30
713.05:286:28
812.95:306:25
912.95:326:23
1012.85:336:20
1112.75:356:18
1212.75:376:16
1312.65:386:13
1412.55:406:11
1512.55:416:09
1612.45:436:06
1712.35:456:04
1812.35:466:01
1912.25:485:59
2012.15:505:57
2112.15:515:54
2212.05:535:52
2311.95:555:50
2411.85:565:47
2511.85:585:45
2611.76:005:42
2711.66:015:40
2811.66:035:38
2911.56:055:35
3011.46:065:33

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.18 kWh/m².

For context, solar energy here swings from a low near 0.67 kWh/m² to a high of 5.48 kWh/m² in June across the year — September's 3.18 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.8Moderate
23.8Moderate
33.7Moderate
43.7Moderate
53.6Moderate
63.6Moderate
73.6Moderate
83.5Moderate
93.5Moderate
103.4Moderate
113.4Moderate
123.3Moderate
133.3Moderate
143.3Moderate
153.2Moderate
163.2Moderate
173.1Moderate
183.1Moderate
193.0Moderate
203.0Moderate
212.9Moderate
222.9Moderate
232.8Moderate
242.8Moderate
252.7Moderate
262.7Moderate
272.6Moderate
282.6Moderate
292.6Moderate
302.5Moderate
Planning a trip in September

Is September a good time to visit Caterham?

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

5.8
Sightseeing
4th-best month of the year
2.1
Beach & pool
4th-best month of the year

September is a reasonable time to visit Caterham for sightseeing.

What to pack for Caterham in September

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

In September, Caterham sees daytime highs around 18°C and nights near 11°C. Worth packing: rain gear. About 9 days see rain.

rain gear

Sea temperature near Caterham in September

The nearest coast averages about 17°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 67 km away) is warmest in August at about 17°C and coldest in March near 8°C.

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

5°10°15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan9Bracing
Feb8Bracing
Mar8Bracing
Apr9Bracing
May11Bracing
Jun13Bracing
Jul16Cool
Aug17Cool
Sep17Cool
Oct16Cool
Nov14Bracing
Dec11Bracing

UV index in Caterham in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Caterham peaks around July 24 at about 6 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near January 1 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 6 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJul 24UV 6Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr4Moderate
May6High
Jun6High
Jul6High
Aug6High
Sep4Moderate
Oct2Moderate
Nov1Low
Dec1Low
Location & terrain

Where is Caterham?

Caterham sits at 51.3°N, 0.1°W, 140 m above sea level, in United Kingdom. The nearest listed city is Coulsdon, 6.0 km away.

Topography around Caterham

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

Within 3 km, the terrain around Caterham has only modest variations in elevation — a maximum elevation change of 164 m around an average of 175 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 269 m; within 80 km, significant variations in elevation — a maximum elevation change of 303 m.

The land around Caterham is covered by trees (57%) and grassland (33%) within 3 km, trees (42%) and grassland (33%) within 16 km, and grassland (28%), trees (26%) and cropland (21%) within 80 km.

3 km
164 m
16 km
269 m
80 km
303 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Coulsdon 6.0 km · Purley 6.0 km · Redhill 8.0 km · South Croydon 9.0 km · Banstead 10 km · Reigate 10 km · Wallington 10 km · Sutton 11 km

United Kingdom travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type D / G / M
230 V · 50 Hz
Prices
≈ 89% of US
price level, 2025
GDP per capita
$57,602
2025
Happiness
6.7 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
1.1
per 100k, 2021
Road deaths
3.2
per 100k/yr, 2019
Income group
High
World Bank
Religion
Christian 60%none 26%Muslim 4%other 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 Caterham (51.2823°, -0.0789°, elevation 140 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).