Alton weather in August

In August, Alton sees average daytime highs of 21°C and overnight lows near 13°C, with 64 mm of rain across 10.6 wet days and about 14.4 hours of daylight. It is the 2nd-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 22°C in the first days to 20°C by the end. The sky is clear or mostly clear about 16% of the time in August, and the air most often feels dry.

Daylight stretches from about 15 h 12 min at the start of August to 13 h 24 min by month's end. Set against the rest of the year, August is Alton's 2nd-clearest and 12th-windiest month. For the whole year in context, see Alton's year-round climate.

Daytime high
21°
2nd warmest
Overnight low
13°
11th coldest
Rainfall
64 mm
10.6 wet days
Daylight
14 h 24 min
4:57 AM – 7:19 PM
Cloud cover
67%
2nd clearest
Wind
13 km/h
12th windiest
Solar energy
4.26 kWh/m²
Travel score
6.2
out of 10

Alton is town in Hampshire, England.

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 22°C in the first days to 20°C by the end.

A typical August day in Alton reaches about 21°C in the afternoon and slips back to 13°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 25°C. Set against its neighbours, August runs on par with July and about 3°C warmer than September.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12213
22213
32213
42213
52213
62213
72213
82213
92213
102213
112113
122113
132113
142113
152113
162113
172113
182113
192113
202113
212113
222113
232112
242012
252012
262012
272012
282012
292012
302012
312012

How August really feels in Alton

Once humidity and wind are folded in, August 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

August sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Alton weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 6011.20.88.21.0
Feb / 479.50.99.61.2
Mar10° / 469.90.511.52.3
Apr13° / 5611.30.113.53.5
May16° / 5910.6015.34.9
Jun19° / 11°5710.1016.25.9
Jul21° / 13°5810.9015.96.3
Aug21° / 13°6410.6014.46.2
Sep18° / 11°529.2012.45.8
Oct14° / 6611.5010.44.0
Nov10° / 6811.30.18.72.3
Dec / 6411.20.87.71.2

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 16% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 20% of August, with mostly cloudy or overcast conditions the remaining 64%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13664
23763
33664
43664
53763
63664
73664
83664
93763
103862
113763
123763
133763
143763
153763
163664
173664
183664
193664
203664
213664
223664
233664
243565
253466
263367
273367
283466
293367
303367
313367

Chance of precipitation in August

Any precipitation

Alton gets around 64 mm of rain over 10.6 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 35% and peaks near 37% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
133
234
334
434
534
634
734
834
934
1035
1135
1235
1336
1436
1536
1637
1737
1837
1937
2037
2137
2237
2336
2435
2535
2634
2733
2832
2932
3031
3130

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the dry band about 54% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
1464410
2464410
3464311
4474211
5474111
6484112
7484012
8493912
9493912
10503812
11503812
12513712
13513712
14513712
15523612
16533611
17533611
18533611
19543610
20543610
2156359
2256359
2358348
2459338
2560337
2661327
2761327
2863316
2964306
3065305
3166295

Wind in August

Winds average 13 km/h in August, the calmest month.

Across August, daily wind ranges from about 13 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 15 h 12 min at the start of August to 13 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 108 minutes over August. Sunrise moves from 4:33 AM to 5:21 AM, and sunset from 7:46 PM to 6:47 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.24:337:46
215.24:357:45
315.14:367:43
415.14:387:42
515.04:397:40
615.04:417:38
714.94:437:36
814.84:447:35
914.84:467:33
1014.74:477:31
1114.74:497:29
1214.64:507:27
1314.64:527:25
1414.54:537:23
1514.44:557:21
1614.44:577:19
1714.34:587:17
1814.35:007:15
1914.25:017:13
2014.15:037:11
2114.15:057:09
2214.05:067:07
2313.95:087:05
2413.95:097:03
2513.85:117:00
2613.85:136:58
2713.75:146:56
2813.65:166:54
2913.65:186:52
3013.55:196:49
3113.45:216:47

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.26 kWh/m².

For context, solar energy here swings from a low near 0.67 kWh/m² to a high of 5.33 kWh/m² in June across the year — August's 4.26 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.7Bright
44.7Bright
54.7Bright
64.6Bright
74.6Bright
84.6Bright
94.5Bright
104.5Bright
114.5Bright
124.4Bright
134.4Bright
144.3Bright
154.3Bright
164.3Bright
174.2Bright
184.2Bright
194.2Bright
204.1Bright
214.1Bright
224.0Bright
234.0Bright
244.0Moderate
253.9Moderate
263.9Moderate
273.9Moderate
283.8Moderate
293.8Moderate
303.8Moderate
313.7Moderate
Planning a trip in August

Is August a good time to visit Alton?

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

6.2
Sightseeing
2nd-best month of the year
3.8
Beach & pool
2nd-best month of the year

August is a reasonable time to visit Alton for sightseeing.

What to pack for Alton in August

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

In August, Alton sees daytime highs around 21°C and nights near 13°C. Worth packing: rain gear. About 11 days see rain.

rain gear

Sea temperature near Alton in August

The nearest coast averages about 18°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 59 km away) is warmest in August at about 18°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°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan9Bracing
Feb8Bracing
Mar8Bracing
Apr9Bracing
May11Bracing
Jun14Bracing
Jul16Cool
Aug18Cool
Sep17Cool
Oct16Cool
Nov13Bracing
Dec11Bracing

UV index in Alton in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August 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 Alton peaks around August 10 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowAug 10UV 6Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr4Moderate
May6High
Jun6High
Jul6High
Aug6High
Sep4Moderate
Oct2Moderate
Nov1Low
Dec1Low
Location & terrain

Where is Alton?

Alton sits at 51.1°N, 1.0°W, 104 m above sea level, in United Kingdom. The nearest listed city is Bordon, 9.0 km away.

Topography around Alton

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

Within 3 km, the terrain around Alton has only modest variations in elevation — a maximum elevation change of 121 m around an average of 134 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 212 m; within 80 km, significant variations in elevation — a maximum elevation change of 302 m.

The land around Alton is covered by cropland (34%), trees (29%) and grassland (28%) within 3 km, trees (36%), cropland (33%) and grassland (27%) within 16 km, and grassland (30%), trees (24%) and cropland (21%) within 80 km.

3 km
121 m
16 km
212 m
80 km
302 m
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Bordon 9.0 km · Farnham 14 km · Basingstoke 15 km · Fleet 18 km · Aldershot 18 km · Haslemere 20 km · Farnborough 22 km · Yateley 24 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 Alton (51.1493°, -0.9747°, elevation 104 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).