Monroe weather in August

In August, Monroe sees average daytime highs of 87°F and overnight lows near 70°F, with 4.4 in of rain across 13 wet days and about 13.3 hours of daylight. It is the 2nd-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 87°F through the month. The sky is clear or mostly clear about 28% of the time in August, and the air most often feels oppressive.

Daylight stretches from about 13 h 48 min at the start of August to 12 h 48 min by month's end. Set against the rest of the year, August is Monroe's 9th-clearest and 12th-windiest month. For the whole year in context, see Monroe's year-round climate.

Daytime high
87°
2nd warmest
Overnight low
70°
11th coldest
Rainfall
4.4 in
13 wet days
Daylight
13 h 18 min
5:47 AM – 7:06 PM
Cloud cover
59%
9th clearest
Wind
4 mph
12th windiest
Solar energy
5.39 kWh/m²
Travel score
4.4
out of 10

Monroe is city in and county seat of Union County, North Carolina, United States.

Density
440/km²
people per km²
Founded
1843

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 87°F through the month.

A typical August day in Monroe reaches about 87°F in the afternoon and slips back to 70°F overnight — a 17°F spread between the day's warmth and the night's chill. On most days the high lands between 81°F and 93°F. Set against its neighbours, August runs about 2°F cooler than July and about 5°F warmer than September.

60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18871
28871
38871
48871
58871
68871
78871
88871
98871
108871
118771
128771
138771
148771
158771
168770
178770
188770
198770
208770
218770
228770
238770
248669
258669
268669
278669
288669
298669
308668
318568

How August really feels in Monroe

Once humidity and wind are folded in, August averages 24 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
24
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

The story in August is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Monroe weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan52° / 34°3.79.419.93.0
Feb56° / 37°3.38.90.810.73.8
Mar64° / 43°3.99.80.311.75.7
Apr73° / 52°3.58.6012.97.0
May80° / 60°3.210.5013.86.4
Jun86° / 68°4.313.2014.34.5
Jul89° / 72°4.415.6014.13.6
Aug87° / 70°4.413013.34.4
Sep82° / 64°4.29.4012.26.3
Oct72° / 53°3.37.1011.17.3
Nov62° / 42°3.27.80.110.25.8
Dec55° / 37°3.79.10.49.73.6

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 28% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 22% of August, with mostly cloudy or overcast conditions the remaining 50%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14852
24852
34852
44852
54852
64951
74951
84951
94951
104951
114951
124951
134951
144951
155050
165050
175149
185149
195149
205149
215149
225149
235248
245248
255248
265149
275149
285248
295248
305248
315248

Chance of precipitation in August

Any precipitation

Monroe gets around 4.4 in of rain over 13 wet days in August, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 43% and peaks near 51% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
151
251
350
450
549
649
748
848
948
1047
1147
1246
1346
1445
1545
1644
1743
1842
1941
2040
2139
2239
2338
2437
2537
2636
2736
2835
2935
3035
3134

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the oppressive band about 43% of days. Sticky, muggy-or-worse air turns up on roughly 82% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
115832540
216832530
316933510
416933510
516933510
616934491
7161034491
8161034481
9161035481
10161035481
11151036481
1215936471
1315937471
14151037461
15151038461
16151038451
17151039441
18151140431
19151141421
20151142401
21151143391
22151143381
23161244371
24161244361
25171344350
26271344340
27281443330
28281542320
29391542310
303101641300
313111740290

Wind in August

Winds average 4 mph in August, the calmest month.

Across August, daily wind ranges from about 4 mph on the calmest days to 5 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
15calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 13 h 48 min at the start of August to 12 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 60 minutes over August. Sunrise moves from 5:35 AM to 5:58 AM, and sunset from 7:22 PM to 6:46 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.85:357:22
213.75:367:21
313.75:367:20
413.75:377:19
513.75:387:18
613.65:397:17
713.65:407:16
813.65:407:15
913.55:417:14
1013.55:427:13
1113.55:437:12
1213.55:437:11
1313.45:447:10
1413.45:457:08
1513.45:467:07
1613.35:477:06
1713.35:477:05
1813.35:487:04
1913.25:497:02
2013.25:507:01
2113.25:507:00
2213.15:516:59
2313.15:526:57
2413.15:536:56
2513.05:536:55
2613.05:546:53
2713.05:556:52
2812.95:566:51
2912.95:566:49
3012.85:576:48
3112.85:586:46

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.39 kWh/m².

For context, solar energy here swings from a low near 2.31 kWh/m² to a high of 6.18 kWh/m² in June across the year — August's 5.39 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.7Bright
45.6Bright
55.6Bright
65.6Bright
75.6Bright
85.5Bright
95.5Bright
105.5Bright
115.5Bright
125.5Bright
135.4Bright
145.4Bright
155.4Bright
165.4Bright
175.4Bright
185.3Bright
195.3Bright
205.3Bright
215.3Bright
225.3Bright
235.3Bright
245.2Bright
255.2Bright
265.2Bright
275.2Bright
285.2Bright
295.1Bright
305.1Bright
315.1Bright
Planning a trip in August

Is August a good time to visit Monroe?

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

4.4
Sightseeing
8th-best month of the year
6.2
Beach & pool
4th-best month of the year

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

What to pack for Monroe in August

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

In August, Monroe sees daytime highs around 87°F and nights near 70°F. Pack light clothes. Worth having: rain gear and sun protection. About 13 days see rain.

light clothesrain gearsun protection

UV index in Monroe in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Monroe peaks around July 13 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJul 13UV 9Dec 20UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr7High
May8Very high
Jun9Very high
Jul9Very high
Aug8Very high
Sep7Very high
Oct5Moderate
Nov4Moderate
Dec2Moderate

Air quality in Monroe in August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.

Air quality in Monroe is worst in July — around 18 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (December, 7 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 2418 µg/m³Dec 207 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb11Good
Mar13Moderate
Apr12Good
May13Moderate
Jun16Moderate
Jul18Moderate
Aug18Moderate
Sep16Moderate
Oct14Moderate
Nov9Good
Dec7Good
Location & terrain

Where is Monroe?

Monroe sits at 35.0°N, 80.5°W, 591 ft above sea level, in United States. The nearest listed city is Indian Trail, 9.3 mi away.

Topography around Monroe

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

Within 2 miles, the terrain around Monroe has only modest variations in elevation — a maximum elevation change of 161 ft around an average of 600 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 377 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,617 ft.

The land around Monroe is covered by trees (50%) and grassland (21%) within 2 miles, trees (49%), grassland (24%) and cropland (22%) within 10 miles, and trees (76%) within 50 miles.

2 miles
161 ft
10 miles
377 ft
50 miles
1,617 ft
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Indian Trail 9.3 mi · Stallings 11 mi · Matthews 14 mi · Mint Hill 14 mi · Charlotte 24 mi · Rock Hill 27 mi · Concord 29 mi · Albemarle 32 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 Monroe (34.9854°, -80.5495°, elevation 591 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. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).