Bethlehem weather in March

In March, Bethlehem sees average daytime highs of 48°F and overnight lows near 31°F, with 4.1 in of precipitation across 10.9 wet days and about 11.7 hours of daylight. It is the 9th-warmest and 5th-wettest month of the year here.

Highs climb over the month, from about 44°F in the first days to 53°F by the end. The sky is clear or mostly clear about 25% of the time in March, and the air most often feels dry.

Daylight stretches from about 11 hours at the start of March to 12 h 24 min by month's end. Set against the rest of the year, March is Bethlehem's 10th-clearest and 1st-windiest month. For the whole year in context, see Bethlehem's year-round climate.

Daytime high
48°
9th warmest
Overnight low
31°
4th coldest
Precipitation
4.1 in
10.9 wet days
Daylight
11 h 42 min
6:21 AM – 6:01 PM
Cloud cover
64%
10th clearest
Wind
7 mph
1st windiest
Solar energy
4.02 kWh/m²
Travel score
1.8
out of 10

Bethlehem is city in Lehigh and Northampton counties, Pennsylvania, USA.

Density
1,487/km²
people per km²
Founded
1741

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

Temperature in March

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 44°F in the first days to 53°F by the end.

A typical March day in Bethlehem reaches about 48°F in the afternoon and slips back to 31°F overnight — a 17°F spread between the day's warmth and the night's chill. On most days the high lands between 36°F and 62°F. Set against its neighbours, March runs about 9°F warmer than February and about 12°F cooler than April.

20°40°60°151015202531
Avg high (°F)Avg low (°F)
14427
24427
34427
44428
54528
64528
74528
84629
94629
104629
114729
124730
134730
144730
154830
164831
174831
184831
194932
204932
214932
225033
235033
245133
255134
265134
275235
285235
295335
305336
315436

How March really feels in Bethlehem

Once humidity and wind are folded in, March averages 0 days that feel above 90°F and 31 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
31
wind chill below the day's low

The story in March is cold — wind chill drags the overnight "feels like" below the raw low.

Bethlehem weather by month

How March compares with the rest of the year at a glance. March is the 9th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan37° / 23°3.69.65.29.40.0
Feb40° / 24°3.18.94.610.40.1
Mar48° / 31°4.110.93.811.71.8
Apr60° / 42°3.910.70.5134.7
May70° / 51°3.711.4014.26.2
Jun79° / 60°4.111014.86.3
Jul84° / 65°3.610.2014.65.4
Aug82° / 64°3.79.8013.66.1
Sep75° / 56°4.38.8012.37.0
Oct63° / 45°4.18.70.210.95.7
Nov51° / 35°3.38.30.89.72.7
Dec41° / 28°4.19.93.49.10.3

Cloud cover in March

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% of the time in March.

Beyond those clear spells, partly cloudy skies cover about 15% of March, with mostly cloudy or overcast conditions the remaining 60%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14159
24159
34159
44258
54159
64258
74258
84258
94258
104258
114357
124357
134258
144258
154159
164159
174060
184060
194060
204060
213961
223961
233961
243961
253961
263961
273961
283961
293961
303961
313961

Chance of precipitation in March

Any precipitationSnow

Bethlehem gets around 4.1 in of rain and snow over 10.9 wet days in March. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 34% and peaks near 38% on the wettest days, and about 4 days bring snow.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
13514
23514
33514
43514
53514
63414
73414
83413
93413
103313
113313
123313
133213
143213
153212
163212
173212
183212
193311
203311
213411
223410
233510
24369
25369
26378
27378
28377
29387
30386
31386

Humidity in March

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, March lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
11000
21000
31000
41000
51000
61000
71000
81000
91000
101000
111000
121000
131000
141000
151000
161000
171000
181000
191000
20991
21991
22991
23991
24991
25991
26991
27991
28991
29991
30991
31991

Wind in March

Winds average 7 mph in March, the windiest month of the year.

Across March, daily wind ranges from about 7 mph on the calmest days to 8 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
17light breeze
27light breeze
37light breeze
47light breeze
58light breeze
68light breeze
78light breeze
88light breeze
97light breeze
107light breeze
117light breeze
127light breeze
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in March

DaylightNight

Daylight runs from about 11 hours at the start of March to 12 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 84 minutes over March. Sunrise moves from 6:45 AM to 5:56 AM, and sunset from 5:44 PM to 6:17 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.06:455:44
211.06:445:45
311.16:425:47
411.16:415:48
511.26:395:49
611.26:375:50
711.36:365:51
811.36:345:52
911.36:335:53
1011.46:315:55
1111.46:295:56
1211.56:285:57
1311.56:265:58
1411.66:245:59
1511.66:236:00
1611.76:216:01
1711.76:196:02
1811.86:186:03
1911.86:166:04
2011.96:146:05
2111.96:136:07
2211.96:116:08
2312.06:096:09
2412.06:086:10
2512.16:066:11
2612.16:046:12
2712.26:036:13
2812.26:016:14
2912.35:596:15
3012.35:576:16
3112.45:566:17

Solar energy in March

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in March, about 4.02 kWh/m².

For context, solar energy here swings from a low near 1.73 kWh/m² to a high of 5.99 kWh/m² in June across the year — March's 4.02 kWh/m² falls in the middle.

012345151015202531
Solar energy (kWh/m²)Level
13.5Moderate
23.5Moderate
33.6Moderate
43.6Moderate
53.7Moderate
63.7Moderate
73.7Moderate
83.8Moderate
93.8Moderate
103.9Moderate
113.9Moderate
123.9Moderate
134.0Moderate
144.0Bright
154.0Bright
164.1Bright
174.1Bright
184.1Bright
194.2Bright
204.2Bright
214.2Bright
224.2Bright
234.3Bright
244.3Bright
254.3Bright
264.3Bright
274.3Bright
284.4Bright
294.4Bright
304.4Bright
314.5Bright
Planning a trip in March

Is March a good time to visit Bethlehem?

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

1.8
Sightseeing
9th-best month of the year
0.0
Beach & pool
9th-best month of the year

March is a weaker month for outdoor sightseeing in Bethlehem.

What to pack for Bethlehem in March

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

In March, Bethlehem sees daytime highs around 48°F and nights near 31°F. Pack a warm layer. Worth having: rain gear. About 11 days see rain.

a warm layerrain gear

UV index in Bethlehem in March

LowModerateHighVery highExtreme

Clear-sky midday UV in March peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Bethlehem peaks around July 10 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 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 10UV 8Dec 22UV 1
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May8Very high
Jun8Very high
Jul8Very high
Aug6High
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low

Air quality in Bethlehem in March

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Bethlehem is worst in July — around 18 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (November, 9 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1518 µg/m³Nov 149 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb13Moderate
Mar14Moderate
Apr14Moderate
May16Moderate
Jun17Moderate
Jul18Moderate
Aug15Moderate
Sep13Moderate
Oct10Good
Nov9Good
Dec10Good
Location & terrain

Where is Bethlehem?

Bethlehem sits at 40.6°N, 75.4°W, 358 ft above sea level, in United States. The nearest listed city is Allentown, 6.2 mi away.

Topography around Bethlehem

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

Within 2 miles, the terrain around Bethlehem has only modest variations in elevation — a maximum elevation change of 778 ft around an average of 358 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,024 ft; within 50 miles, large variations in elevation — a maximum elevation change of 2,516 ft.

The land around Bethlehem is covered by trees (43%) and artificial surfaces (36%) within 2 miles, trees (49%) and grassland (21%) within 10 miles, and trees (73%) within 50 miles.

2 miles
778 ft
10 miles
1,024 ft
50 miles
2,516 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
March weather nearby: Allentown 6.2 mi · Whitehall Township 7.5 mi · Easton 8.7 mi · Lansdale 27 mi · Limerick 29 mi · Pottstown 30 mi · Norristown 35 mi · Phoenixville 35 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 Bethlehem (40.6259°, -75.3705°, elevation 358 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).