Frederick weather in April

In April, Frederick sees average daytime highs of 64°F and overnight lows near 45°F, with 3.5 in of precipitation across 10.2 wet days and about 13 hours of daylight. It is the 7th-warmest and 5th-wettest month of the year here.

Highs climb over the month, from about 60°F in the first days to 68°F by the end. The sky is clear or mostly clear about 26% of the time in April, and the air most often feels dry.

Daylight stretches from about 12 h 24 min at the start of April to 13 h 36 min by month's end. Set against the rest of the year, April is Frederick's 7th-clearest and 4th-windiest month. For the whole year in context, see Frederick's year-round climate.

Daytime high
64°
7th warmest
Overnight low
45°
6th coldest
Precipitation
3.5 in
10.2 wet days
Daylight
13 hours
5:39 AM – 6:41 PM
Cloud cover
63%
7th clearest
Wind
7 mph
4th windiest
Solar energy
5.15 kWh/m²
Travel score
5.6
out of 10

Frederick is city in Frederick County, Maryland, United States.

Density
1,156/km²
people per km²
Founded
1745

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

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 60°F in the first days to 68°F by the end.

A typical April day in Frederick reaches about 64°F in the afternoon and slips back to 45°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 51°F and 78°F. Set against its neighbours, April runs about 12°F warmer than March and about 9°F cooler than May.

20°40°60°80°151015202530
Avg high (°F)Avg low (°F)
15940
25940
36041
46041
56041
66142
76142
86242
96243
106343
116343
126344
136444
146444
156445
166545
176546
186546
196646
206646
216647
226747
236747
246747
256748
266748
276848
286849
296849
306949

How April really feels in Frederick

Once humidity and wind are folded in, April 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

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

Frederick weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan40° / 26°3.18.73.39.50.0
Feb43° / 27°2.78.53.610.50.6
Mar52° / 35°3.810.22.511.72.8
Apr64° / 45°3.510.20.2135.6
May73° / 54°3.711.8014.16.4
Jun82° / 64°3.410.8014.75.8
Jul87° / 68°3.610.5014.54.8
Aug85° / 67°3.09.9013.55.4
Sep78° / 59°4.29.2012.36.9
Oct66° / 47°3.47.90116.3
Nov54° / 37°3.07.90.49.83.4
Dec44° / 30°3.48.82.29.30.8

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 26% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 15% of April, with mostly cloudy or overcast conditions the remaining 59%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14060
24060
34060
44159
54159
64060
74159
84159
94159
104060
114060
124060
134060
143961
154060
164060
174060
184159
194159
204159
214159
224159
234258
244159
254159
264357
274258
284357
294357
304456

Chance of precipitation in April

Any precipitationSnow

Frederick gets around 3.5 in of rain and snow over 10.2 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 35% and peaks near 40% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%50%151015202530
Rain chance (%)Snow chance (%)
1343
2342
3342
4342
5342
6342
7342
8332
9331
10331
11331
12331
13331
14331
15331
16341
17340
18340
19350
20350
21350
22350
23360
24360
25370
26380
27380
28390
29400
30400

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, April lands in the dry band about 91% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
198200
297300
397300
497300
597300
696400
796400
896400
995500
1095500
1194510
1293610
1393610
1492710
1592710
1692710
1791810
1891810
1990910
2090910
2189920
22881020
23881020
24871120
25841231
26841231
27831331
28821341
29811441
30801541

Wind in April

Winds average 7 mph in April.

Across April, daily wind ranges from about 6 mph on the calmest days to 7 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (mph)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 24 min at the start of April to 13 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 72 minutes over April. Sunrise moves from 6:03 AM to 5:19 AM, and sunset from 6:26 PM to 6:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.46:036:26
212.46:016:27
312.55:596:28
412.55:586:29
512.65:566:30
612.65:556:31
712.65:536:32
812.75:516:33
912.75:506:34
1012.85:486:35
1112.85:476:36
1212.95:456:37
1312.95:436:38
1412.95:426:39
1513.05:406:40
1613.05:396:41
1713.15:376:42
1813.15:366:43
1913.25:346:44
2013.25:336:45
2113.25:316:46
2213.35:306:47
2313.35:296:48
2413.45:276:49
2513.45:266:50
2613.45:246:51
2713.55:236:52
2813.55:226:53
2913.65:206:54
3013.65:196:55

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 5.15 kWh/m².

For context, solar energy here swings from a low near 1.86 kWh/m² to a high of 6.15 kWh/m² in June across the year — April's 5.15 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.8Bright
44.8Bright
54.8Bright
64.9Bright
74.9Bright
85.0Bright
95.0Bright
105.0Bright
115.0Bright
125.1Bright
135.1Bright
145.1Bright
155.2Bright
165.2Bright
175.2Bright
185.2Bright
195.2Bright
205.2Bright
215.3Bright
225.3Bright
235.3Bright
245.3Bright
255.3Bright
265.4Bright
275.4Bright
285.4Bright
295.4Bright
305.4Bright
Planning a trip in April

Is April a good time to visit Frederick?

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

5.6
Sightseeing
5th-best month of the year
1.9
Beach & pool
7th-best month of the year

April is a reasonable time to visit Frederick for sightseeing.

What to pack for Frederick in April

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

In April, Frederick sees daytime highs around 64°F and nights near 45°F. Worth packing: a warm layer, rain gear and sun protection. About 10 days see rain.

a warm layerrain gearsun protection

UV index in Frederick in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April 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 Frederick peaks around July 10 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateLowJul 10UV 9Dec 20UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug7High
Sep6High
Oct3Moderate
Nov2Moderate
Dec2Low

Air quality in Frederick in April

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Frederick is worst in July — around 17 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (November, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1317 µg/m³Nov 138 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb11Good
Mar12Moderate
Apr12Moderate
May15Moderate
Jun16Moderate
Jul17Moderate
Aug14Moderate
Sep12Good
Oct9Good
Nov8Good
Dec9Good
Location & terrain

Where is Frederick?

Frederick sits at 39.4°N, 77.4°W, 285 ft above sea level, in United States. The nearest listed city is Ballenger Creek, 3.1 mi away.

Topography around Frederick

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

Within 2 miles, the terrain around Frederick has only modest variations in elevation — a maximum elevation change of 482 ft around an average of 312 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,791 ft; within 50 miles, large variations in elevation — a maximum elevation change of 2,756 ft.

The land around Frederick is covered by artificial surfaces (41%), trees (28%) and grassland (23%) within 2 miles, trees (47%), grassland (25%) and cropland (22%) within 10 miles, and trees (59%) and grassland (20%) within 50 miles.

2 miles
482 ft
10 miles
1,791 ft
50 miles
2,756 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
April weather nearby: Ballenger Creek 3.1 mi · Damascus 14 mi · Germantown 18 mi · Montgomery Village 20 mi · Gaithersburg 22 mi · Leesburg 22 mi · Hagerstown 23 mi · Redland 24 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 Frederick (39.4143°, -77.4105°, elevation 285 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).