Waterville weather in August

In August, Waterville sees average daytime highs of 76°F and overnight lows near 61°F, with 2.9 in of rain across 9.3 wet days and about 13.9 hours of daylight. It is the 2nd-warmest and 11th-wettest month of the year here.

Highs ease over the month, from about 78°F in the first days to 74°F by the end. The sky is clear or mostly clear about 32% of the time in August, and the air most often feels comfortable.

Daylight stretches from about 14 h 30 min at the start of August to 13 h 06 min by month's end. Set against the rest of the year, August is Waterville's 3rd-clearest and 12th-windiest month. For the whole year in context, see Waterville's year-round climate.

Daytime high
76°
2nd warmest
Overnight low
61°
11th coldest
Rainfall
2.9 in
9.3 wet days
Daylight
13 h 54 min
4:46 AM – 6:39 PM
Cloud cover
57%
3rd clearest
Wind
6 mph
12th windiest
Solar energy
5.17 kWh/m²
Travel score
7.1
out of 10

Waterville is city in Maine, United States.

Density
447/km²
people per km²
Founded
1802

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 78°F in the first days to 74°F by the end.

A typical August day in Waterville reaches about 76°F in the afternoon and slips back to 61°F overnight — a 15°F spread between the day's warmth and the night's chill. On most days the high lands between 69°F and 83°F. Set against its neighbours, August runs on par with July and about 8°F warmer than September.

50°60°70°80°151015202531
Avg high (°F)Avg low (°F)
17862
27862
37862
47862
57862
67862
77862
87762
97762
107762
117762
127761
137761
147761
157661
167661
177661
187660
197660
207660
217660
227560
237560
247559
257559
267559
277459
287458
297458
307458
317458

How August really feels in Waterville

Once humidity and wind are folded in, August averages 0 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
0
heat index over the day's high
Days feeling ≤ 32°F
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.

Waterville weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan28° / 12°3.18.96.890.0
Feb30° / 14°2.98.37.210.10.0
Mar38° / 23°3.610.26.111.60.1
Apr51° / 36°3.810.62.613.22.3
May62° / 46°3.2110.214.65.1
Jun71° / 56°3.811015.36.4
Jul77° / 62°3.19.90156.7
Aug76° / 61°2.99.3013.97.1
Sep68° / 53°3.38.2012.36.6
Oct56° / 42°4.410.10.410.73.9
Nov44° / 31°3.59.52.39.40.8
Dec33° / 20°4.010.76.98.70.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 32% 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 47%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14753
24852
34951
44951
54951
64951
74951
84951
95050
105050
115149
125050
135050
145149
155248
165248
175248
185347
195347
205446
215446
225545
235644
245644
255644
265743
275743
285743
295743
305644
315545

Chance of precipitation in August

Any precipitation

Waterville gets around 2.9 in of rain over 9.3 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 29% and peaks near 31% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
131
231
331
431
530
630
730
831
931
1031
1131
1231
1331
1431
1530
1630
1730
1830
1930
2029
2129
2228
2328
2428
2527
2627
2726
2826
2926
3026
3126

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the comfortable band about 32% of days. Sticky, muggy-or-worse air turns up on roughly 17% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1112938203
2113037193
3113037193
4113136193
5113236192
6113335182
7123335182
8123434182
9123434182
10133433182
11133433181
12143433181
13153433171
14153432171
15163432171
16173332171
17183332171
18193331161
19203231160
20223131160
21233130150
22243130150
23263029150
24273028140
25293027140
26303027130
27313026130
28323025120
29343025120
30352924110
31362924110

Wind in August

Winds average 6 mph in August, the calmest month.

Across August, daily wind ranges from about 6 mph on the calmest days to 6 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 30 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 84 minutes over August. Sunrise moves from 4:29 AM to 5:04 AM, and sunset from 7:00 PM to 6:13 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.54:297:00
214.54:306:59
314.44:316:58
414.44:326:56
514.44:336:55
614.34:356:54
714.34:366:52
814.24:376:51
914.24:386:50
1014.14:396:48
1114.14:406:47
1214.14:426:45
1314.04:436:44
1414.04:446:42
1513.94:456:40
1613.94:466:39
1713.84:486:37
1813.84:496:36
1913.74:506:34
2013.74:516:32
2113.64:526:31
2213.64:546:29
2313.54:556:27
2413.54:566:25
2513.44:576:24
2613.44:586:22
2713.35:006:20
2813.35:016:18
2913.25:026:16
3013.25:036:15
3113.15:046:13

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.17 kWh/m².

For context, solar energy here swings from a low near 1.45 kWh/m² to a high of 5.8 kWh/m² in July across the year — August's 5.17 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.4Bright
45.4Bright
55.4Bright
65.4Bright
75.3Bright
85.3Bright
95.3Bright
105.3Bright
115.2Bright
125.2Bright
135.2Bright
145.2Bright
155.2Bright
165.1Bright
175.1Bright
185.1Bright
195.1Bright
205.1Bright
215.1Bright
225.0Bright
235.0Bright
245.0Bright
255.0Bright
265.0Bright
274.9Bright
284.9Bright
294.9Bright
304.8Bright
314.8Bright
Planning a trip in August

Hazard calendar for Waterville

In seasonPeak

In August, Waterville sits inside its atlantic hurricane season. The full year is below, with each hazard's peak months called out.

Waterville sits in the Atlantic hurricane belt; the season peaks August–October.

Atlantic hurricane
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is August a good time to visit Waterville?

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

7.1
Sightseeing
1st-best month of the year
6.2
Beach & pool
1st-best month of the year

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

What to pack for Waterville in August

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

In August, Waterville sees daytime highs around 76°F and nights near 61°F. Worth packing: light clothes, rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

Sea temperature near Waterville in August

The nearest coast averages about 58°F 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 39 mi away) is warmest in August at about 58°F and coldest in February near 35°F.

The water stays below 68°F all year — cool enough that most swimmers want a wetsuit.

30°40°50°60°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°F)Comfort
Jan39Bracing
Feb35Bracing
Mar35Bracing
Apr40Bracing
May46Bracing
Jun52Bracing
Jul57Bracing
Aug58Bracing
Sep57Bracing
Oct54Bracing
Nov49Bracing
Dec44Bracing

UV index in Waterville in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August 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 Waterville peaks around July 13 at about 7 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 21 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateModerateLowJul 13UV 7Dec 21UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr5Moderate
May7High
Jun6High
Jul8Very high
Aug4Moderate
Sep5High
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Waterville?

Waterville sits at 44.6°N, 69.6°W, 108 ft above sea level, in United States. The nearest listed city is Augusta, 18 mi away.

Topography around Waterville

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Waterville.

Within 2 miles, the terrain around Waterville has only modest variations in elevation — a maximum elevation change of 394 ft around an average of 157 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 696 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 4,298 ft.

The land around Waterville is covered by trees (60%) within 2 miles, trees (72%) within 10 miles, and trees (83%) within 50 miles.

2 miles
394 ft
10 miles
696 ft
50 miles
4,298 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Augusta 18 mi · Lewiston 42 mi · Auburn 43 mi · Bangor 45 mi · Brunswick 47 mi · Portland 69 mi · South Portland 70 mi · Westbrook 71 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 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 Waterville (44.552°, -69.6317°, elevation 108 ft), 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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).