Grosseto weather in August

In August, Grosseto sees average daytime highs of 28°C and overnight lows near 21°C, with 21 mm of rain across 3.2 wet days and about 13.7 hours of daylight. It is the 1st-warmest and 11th-wettest month of the year here.

Highs ease over the month, from about 29°C in the first days to 27°C by the end. The sky is clear or mostly clear about 77% of the time in August, and the air most often feels muggy.

Daylight stretches from about 14 h 24 min at the start of August to 13 h 06 min by month's end. Set against the rest of the year, August is Grosseto's 2nd-clearest and 12th-windiest month. For the whole year in context, see Grosseto's year-round climate.

Daytime high
28°
1st warmest
Overnight low
21°
12th coldest
Rainfall
21 mm
3.2 wet days
Daylight
13 h 48 min
5:27 AM – 7:12 PM
Cloud cover
24%
2nd clearest
Wind
10 km/h
12th windiest
Solar energy
6.23 kWh/m²
Travel score
7.5
out of 10
Air quality
Good
PM2.5 9.3 µg/m³ · 2019

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 29°C in the first days to 27°C by the end.

A typical August day in Grosseto reaches about 28°C in the afternoon and slips back to 21°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 31°C. Set against its neighbours, August runs on par with July and about 4°C warmer than September.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12922
22922
32922
42922
52922
62922
72922
82922
92922
102922
112922
122922
132922
142922
152822
162822
172822
182822
192821
202821
212821
222821
232821
242821
252821
262821
272721
282721
292721
302720
312720

Grosseto weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan12° / 598.39.23.2
Feb12° / 587.910.33.5
Mar14° / 537.611.64.7
Apr17° / 11°538.513.15.8
May21° / 15°42714.47.2
Jun25° / 18°264.515.18.2
Jul28° / 21°152.414.88.0
Aug28° / 21°213.213.77.5
Sep25° / 19°767.612.37.5
Oct20° / 15°1049.910.86.6
Nov16° / 11°12212.29.64.8
Dec13° / 82108.93.5

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 77% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 11% of August, with mostly cloudy or overcast conditions the remaining 12%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1919
29010
3919
4919
5919
6919
7919
89010
99010
108911
118911
128911
138911
148911
158911
168812
178812
188812
198812
208812
218713
228713
238713
248713
258614
268614
278614
288515
298416
308416
318317

Chance of precipitation in August

Any precipitation

Grosseto gets around 21 mm of rain over 3.2 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 11% and peaks near 18% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202531
Rain chance (%)
17
27
37
47
57
67
77
88
98
108
118
129
139
149
1510
1610
1711
1811
1911
2012
2112
2213
2313
2414
2515
2615
2716
2816
2917
3017
3118

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the muggy band about 46% of days. Sticky, muggy-or-worse air turns up on roughly 69% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
125185025
225185025
326194925
426194925
526194924
626204824
726204824
826214824
926214724
1026224724
1116224724
1215224724
1315224724
1415224724
1515224824
1615224824
1714224824
1814224924
1914224924
2014224824
2124224824
2225224724
2325224724
2436224623
2537234423
2648244322
2749244121
28510254020
29611263818
30612283717
31713293616

Wind in August

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

Across August, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
189calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 24 min at the start of August to 13 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 78 minutes over August. Sunrise moves from 5:11 AM to 5:44 AM, and sunset from 7:33 PM to 6:48 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.45:117:33
214.35:127:31
314.35:137:30
414.35:147:29
514.25:157:28
614.25:167:26
714.15:177:25
814.15:187:24
914.15:197:23
1014.05:207:21
1114.05:217:20
1213.95:227:18
1313.95:247:17
1413.85:257:15
1513.85:267:14
1613.85:277:12
1713.75:287:11
1813.75:297:09
1913.65:307:08
2013.65:317:06
2113.55:327:05
2213.55:347:03
2313.45:357:01
2413.45:367:00
2513.45:376:58
2613.35:386:56
2713.35:396:55
2813.25:406:53
2913.25:416:51
3013.15:426:49
3113.15:446:48

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 6.23 kWh/m².

For context, solar energy here swings from a low near 1.59 kWh/m² to a high of 7.16 kWh/m² in July across the year — August's 6.23 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.8Intense
26.7Intense
36.7Intense
46.7Intense
56.6Intense
66.6Intense
76.6Intense
86.5Intense
96.5Intense
106.5Intense
116.4Intense
126.4Intense
136.4Intense
146.3Intense
156.3Intense
166.2Intense
176.2Intense
186.2Intense
196.1Intense
206.1Intense
216.0Intense
226.0Bright
235.9Bright
245.9Bright
255.8Bright
265.8Bright
275.7Bright
285.7Bright
295.6Bright
305.6Bright
315.5Bright
Planning a trip in August

Hazard calendar for Grosseto

In seasonPeak

None of Grosseto's seasonal hazards are active in August. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Grosseto's rainy season runs September–February, when most of the year's rain falls.

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

Is August a good time to visit Grosseto?

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

7.5
Sightseeing
3rd-best month of the year
8.5
Beach & pool
2nd-best month of the year

August is one of the better times to visit Grosseto for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Grosseto in August

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

In August, Grosseto sees daytime highs around 28°C and nights near 21°C. Pack light clothes and sun protection. About 3 days see rain.

light clothessun protection

Sea temperature near Grosseto in August

The nearest coast averages about 25°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 15 km away) is warmest in August at about 25°C and coldest in February near 14°C.

It's comfortable for a long swim from Jun 3 to Oct 28 — about 4.9 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan15Bracing
Feb14Bracing
Mar14Bracing
Apr15Cool
May18Cool
Jun22Refreshing
Jul24Warm
Aug25Warm
Sep23Refreshing
Oct21Refreshing
Nov19Cool
Dec16Cool

UV index in Grosseto in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Grosseto peaks around July 14 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 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 14UV 9Dec 23UV 1
UV index (midday)Level
Jan1Low
Feb3Moderate
Mar5Moderate
Apr5High
May6High
Jun8Very high
Jul9Very high
Aug7Very high
Sep5High
Oct3Moderate
Nov2Moderate
Dec1Low
Location & terrain

Where is Grosseto?

Grosseto sits at 42.8°N, 11.1°E, 10 m above sea level, in Italy. The nearest listed city is Follonica, 34 km away.

Colle di Val d'ElsaCecinaPoggibonsiRosignano Solvay-CastiglioncelloViterbo

Topography around Grosseto

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

Within 3 km, the terrain around Grosseto has only modest variations in elevation — a maximum elevation change of 21 m around an average of 9 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 562 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,724 m.

The land around Grosseto is covered by cropland (38%) and artificial surfaces (31%) within 3 km, cropland (36%), trees (28%) and grassland (23%) within 16 km, and water (40%) and trees (33%) within 80 km.

3 km
21 m
16 km
562 m
80 km
1,724 m
treesshrubsgrasslandcroplandartificial surfaceswaterwetland
August weather nearby: Follonica 34 km · Piombino 51 km · Siena 64 km · Colle di Val d'Elsa 73 km · Cecina 77 km · Poggibonsi 79 km · Rosignano Solvay-Castiglioncello 89 km · Viterbo 90 km

Italy travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F / L
230 V · 50 Hz
Prices
≈ 69% of US
price level, 2025
GDP per capita
$43,309
2025
Happiness
6.6 / 10
World Happiness, 2025
Safe drinking water
97%
of population, 2024
Homicide rate
0.6
per 100k, 2023
Road deaths
5.3
per 100k/yr, 2019
Income group
High
World Bank
English
Moderate
EF EPI 513
Religion
Christian 81%unaffiliated 13%Muslim 5%other 1%

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 Grosseto (42.763°, 11.1094°, elevation 10 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).