Lewiston weather in July

In July, Lewiston sees average daytime highs of 78°F and overnight lows near 62°F, with 3.1 in of rain across 10.1 wet days and about 15 hours of daylight. It is the 1st-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 78°F through the month. The sky is clear or mostly clear about 27% of the time in July, and the air most often feels humid.

Daylight stretches from about 15 h 18 min at the start of July to 14 h 30 min by month's end. Set against the rest of the year, July is Lewiston's 7th-clearest and 11th-windiest month. For the whole year in context, see Lewiston's year-round climate.

Daytime high
78°
1st warmest
Overnight low
62°
12th coldest
Rainfall
3.1 in
10.1 wet days
Daylight
15 hours
4:16 AM – 7:16 PM
Cloud cover
60%
7th clearest
Wind
6 mph
11th windiest
Solar energy
5.94 kWh/m²
Travel score
6.7
out of 10

Lewiston is city in Androscoggin County, Maine, United States.

Density
393/km²
people per km²
Founded
1795

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

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 78°F through the month.

A typical July day in Lewiston reaches about 78°F in the afternoon and slips back to 62°F overnight — a 16°F spread between the day's warmth and the night's chill. On most days the high lands between 70°F and 85°F. Set against its neighbours, July runs about 6°F warmer than June and on par with August.

50°60°70°80°151015202531
Avg high (°F)Avg low (°F)
17661
27661
37761
47761
57761
67761
77762
87762
97762
107762
117862
127862
137862
147862
157862
167862
177862
187863
197863
207863
217863
227863
237863
247863
257863
267863
277863
287863
297863
307863
317863

How July really feels in Lewiston

Once humidity and wind are folded in, July 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

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

Lewiston weather by month

How July compares with the rest of the year at a glance. July is the 1st-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan29° / 14°3.28.96.99.10.0
Feb32° / 16°3.08.66.710.20.0
Mar39° / 25°3.810.3611.60.2
Apr52° / 36°3.810.52.213.22.6
May62° / 46°3.110.50.114.55.2
Jun72° / 56°3.710.7015.26.4
Jul78° / 62°3.110.10156.7
Aug77° / 61°3.19013.87.1
Sep69° / 54°3.48.6012.36.7
Oct57° / 43°4.59.70.310.84.2
Nov46° / 33°3.69.529.41.2
Dec35° / 22°4.010.66.38.80.0

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 27% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 22% of July, with mostly cloudy or overcast conditions the remaining 51%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14654
24852
34852
44852
55050
65050
75149
85149
95149
105149
115149
125050
135050
145050
155050
165050
174951
184951
194852
204753
214753
224654
234654
244654
254654
264654
274753
284753
294852
304852
314951

Chance of precipitation in July

Any precipitation

Lewiston gets around 3.1 in of rain over 10.1 wet days in July. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 33% and peaks near 34% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
134
234
334
433
533
633
733
833
933
1033
1133
1233
1333
1433
1533
1633
1733
1833
1933
2033
2133
2233
2333
2433
2533
2633
2733
2833
2933
3033
3132

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the humid band about 31% of days. Sticky, muggy-or-worse air turns up on roughly 23% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1253028152
2243028152
3233128162
4223228162
5213228162
6203328172
7203328172
8193328172
9193328182
10183328182
11183229192
12173229202
13173129202
14163130212
15163030222
16162931222
17162931222
18152832232
19152732233
20152633243
21142633243
22142533243
23142534243
24132534243
25132534243
26132534243
27132634243
28132634243
29132634233
30132734233
31132733233

Wind in July

Winds average 6 mph in July.

Across July, 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 July

DaylightNight

Daylight runs from about 15 h 18 min at the start of July to 14 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 48 minutes over July. Sunrise moves from 4:06 AM to 4:31 AM, and sunset from 7:22 PM to 7:03 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.34:067:22
215.34:077:22
315.24:077:22
415.24:087:22
515.24:087:22
615.24:097:21
715.24:107:21
815.24:107:21
915.24:117:20
1015.14:127:20
1115.14:127:19
1215.14:137:19
1315.14:147:18
1415.04:157:18
1515.04:167:17
1615.04:167:16
1715.04:177:16
1814.94:187:15
1914.94:197:14
2014.94:207:14
2114.94:217:13
2214.84:227:12
2314.84:237:11
2414.84:247:10
2514.74:257:09
2614.74:267:08
2714.74:277:07
2814.64:287:06
2914.64:297:05
3014.64:307:04
3114.54:317:03

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 5.94 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 1.48 kWh/m² to a high of 5.94 kWh/m² in July across the year — July's 5.94 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.1Intense
26.1Intense
36.1Intense
46.1Intense
56.1Intense
66.1Intense
76.0Intense
86.0Intense
96.0Intense
106.0Intense
116.0Intense
126.0Bright
136.0Bright
146.0Bright
155.9Bright
165.9Bright
175.9Bright
185.9Bright
195.8Bright
205.8Bright
215.8Bright
225.8Bright
235.8Bright
245.8Bright
255.7Bright
265.7Bright
275.7Bright
285.7Bright
295.7Bright
305.7Bright
315.7Bright
Planning a trip in July

Hazard calendar for Lewiston

In seasonPeak

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

Lewiston 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 July a good time to visit Lewiston?

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

6.7
Sightseeing
2nd-best month of the year
6.2
Beach & pool
2nd-best month of the year

July is a reasonable time to visit Lewiston for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Lewiston in July

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

In July, Lewiston sees daytime highs around 78°F and nights near 62°F. Worth packing: light clothes, rain gear and sun protection. About 10 days see rain.

light clothesrain gearsun protection

Sea temperature near Lewiston in July

The nearest coast averages about 62°F in July — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 33 mi away) is warmest in August at about 63°F and coldest in March near 38°F.

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

40°50°60°70°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°F)Comfort
Jan42Bracing
Feb39Bracing
Mar38Bracing
Apr42Bracing
May48Bracing
Jun55Bracing
Jul62Cool
Aug63Cool
Sep60Cool
Oct54Bracing
Nov49Bracing
Dec45Bracing

UV index in Lewiston in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July 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 Lewiston peaks around July 12 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 12UV 7Dec 21UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr5Moderate
May7High
Jun6High
Jul7Very high
Aug4Moderate
Sep6High
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Lewiston?

Lewiston sits at 44.1°N, 70.2°W, 217 ft above sea level, in United States. The nearest listed city is Auburn, 0.6 mi away.

Topography around Lewiston

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

Within 2 miles, the terrain around Lewiston has only modest variations in elevation — a maximum elevation change of 400 ft around an average of 262 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 843 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 4,783 ft.

The land around Lewiston is covered by trees (56%) and artificial surfaces (28%) within 2 miles, trees (76%) within 10 miles, and trees (74%) and water (20%) within 50 miles.

2 miles
400 ft
10 miles
843 ft
50 miles
4,783 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
July weather nearby: Auburn 0.6 mi · Brunswick 18 mi · Augusta 26 mi · Westbrook 30 mi · Portland 30 mi · South Portland 32 mi · South Portland Gardens 32 mi · West Scarborough 38 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 Lewiston (44.1003°, -70.2148°, elevation 217 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).