Forest Grove weather in March

In March, Forest Grove sees average daytime highs of 54°F and overnight lows near 39°F, with 5.9 in of precipitation across 17.3 wet days and about 11.6 hours of daylight. It is the 8th-warmest and 4th-wettest month of the year here.

Highs climb over the month, from about 52°F in the first days to 56°F by the end. The sky is clear or mostly clear about 13% of the time in March, and the air most often feels dry.

Daylight stretches from about 10 h 48 min at the start of March to 12 h 24 min by month's end. Set against the rest of the year, March is Forest Grove's 9th-clearest and 2nd-windiest month. For the whole year in context, see Forest Grove's year-round climate.

Daytime high
54°
8th warmest
Overnight low
39°
4th coldest
Precipitation
5.9 in
17.3 wet days
Daylight
11 h 36 min
6:34 AM – 6:10 PM
Cloud cover
74%
9th clearest
Wind
5 mph
2nd windiest
Solar energy
3.14 kWh/m²
Travel score
2.7
out of 10

Forest Grove is city in Oregon, USA.

Density
1,608/km²
people per km²
Founded
1840

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 52°F in the first days to 56°F by the end.

A typical March day in Forest Grove reaches about 54°F in the afternoon and slips back to 39°F overnight — a 15°F spread between the day's warmth and the night's chill. On most days the high lands between 47°F and 63°F. Set against its neighbours, March runs about 5°F warmer than February and about 5°F cooler than April.

20°30°40°50°60°70°151015202531
Avg high (°F)Avg low (°F)
15137
25138
35238
45238
55238
65238
75338
85338
95339
105339
115339
125439
135439
145439
155439
165439
175439
185439
195539
205539
215540
225540
235540
245540
255540
265540
275640
285640
295640
305640
315640

How March really feels in Forest Grove

Once humidity and wind are folded in, March 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

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

Forest Grove weather by month

How March compares with the rest of the year at a glance. March is the 8th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan46° / 36°6.817.11.98.91.0
Feb49° / 37°5.214.21.610.11.8
Mar54° / 39°5.917.30.911.62.7
Apr59° / 42°4.515.60.113.23.8
May66° / 47°2.710.6014.75.9
Jun72° / 52°1.67.2015.47.1
Jul80° / 56°0.42.2015.18.2
Aug80° / 57°0.52.5013.98.1
Sep74° / 53°1.76012.37.7
Oct62° / 46°4.211.5010.75.1
Nov51° / 40°7.017.30.59.32.0
Dec45° / 36°8.017.52.38.60.8

Cloud cover in March

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 13% of the time in March.

Beyond those clear spells, partly cloudy skies cover about 13% of March, with mostly cloudy or overcast conditions the remaining 75%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12773
22872
32773
42773
52575
62575
72476
82476
92575
102476
112476
122476
132476
142476
152476
162476
172476
182476
192476
202476
212575
222674
232674
242674
252773
262773
272773
282773
292674
302674
312674

Chance of precipitation in March

Any precipitationSnow

Forest Grove gets around 5.9 in of rain and snow over 17.3 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 56% and peaks near 58% on the wettest days, and about 1 day brings snow.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
1535
2535
3535
4535
5534
6544
7544
8544
9544
10554
11553
12553
13553
14563
15563
16573
17573
18573
19583
20583
21583
22572
23572
24572
25572
26572
27572
28562
29562
30562
31561

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 (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100
31100

Wind in March

Winds average 5 mph in March.

Across March, daily wind ranges from about 5 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
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in March

DaylightNight

Daylight runs from about 10 h 48 min 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 96 minutes over March. Sunrise moves from 7:02 AM to 6:05 AM, and sunset from 5:50 PM to 6:30 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.87:025:50
210.87:005:51
310.96:585:52
411.06:565:54
511.06:555:55
611.16:535:57
711.16:515:58
811.26:495:59
911.26:476:01
1011.36:456:02
1111.36:446:03
1211.46:426:05
1311.46:406:06
1411.56:386:07
1511.56:366:09
1611.66:346:10
1711.76:326:12
1811.76:306:13
1911.86:286:14
2011.86:266:16
2111.96:246:17
2211.96:226:18
2312.06:206:20
2412.06:186:21
2512.16:166:22
2612.26:156:24
2712.26:136:25
2812.36:116:26
2912.36:096:28
3012.46:076:29
3112.46:056:30

Solar energy in March

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in March, about 3.14 kWh/m².

For context, solar energy here swings from a low near 1.03 kWh/m² to a high of 6.77 kWh/m² in July across the year — March's 3.14 kWh/m² falls in the middle.

01234151015202531
Solar energy (kWh/m²)Level
12.6Moderate
22.6Moderate
32.6Moderate
42.7Moderate
52.7Moderate
62.7Moderate
72.8Moderate
82.8Moderate
92.8Moderate
102.9Moderate
112.9Moderate
123.0Moderate
133.0Moderate
143.0Moderate
153.1Moderate
163.1Moderate
173.2Moderate
183.2Moderate
193.3Moderate
203.3Moderate
213.4Moderate
223.4Moderate
233.5Moderate
243.5Moderate
253.5Moderate
263.6Moderate
273.6Moderate
283.7Moderate
293.7Moderate
303.8Moderate
313.8Moderate
Planning a trip in March

Hazard calendar for Forest Grove

In seasonPeak

In March, Forest Grove sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Forest Grove's rainy season runs October–April, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is March a good time to visit Forest Grove?

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

2.7
Sightseeing
8th-best month of the year
0.0
Beach & pool
9th-best month of the year

March is a weaker month for outdoor sightseeing in Forest Grove.

What to pack for Forest Grove in March

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

In March, Forest Grove sees daytime highs around 54°F and nights near 39°F. Pack rain gear. Worth having: a warm layer. About 17 days see rain.

rain geara warm layer

Sea temperature near Forest Grove in March

The nearest coast averages about 50°F in March — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 38 mi away) is warmest in August at about 59°F and coldest in February near 49°F.

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

50°55°60°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°F)Comfort
Jan50Bracing
Feb49Bracing
Mar50Bracing
Apr51Bracing
May54Bracing
Jun57Bracing
Jul58Bracing
Aug59Bracing
Sep58Bracing
Oct55Bracing
Nov53Bracing
Dec50Bracing

UV index in Forest Grove in March

LowModerateHighVery highExtreme

Clear-sky midday UV in March 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 Forest Grove peaks around July 17 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateVery highVery highHighModerateLowJul 17UV 8Dec 17UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr5High
May8Very high
Jun7High
Jul8Very high
Aug7High
Sep5Moderate
Oct3Moderate
Nov1Low
Dec1Low

Air quality in Forest Grove 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 Forest Grove is worst in September — around 22 µg/m³ PM2.5 (moderate), about 3.0× the cleanest month (January, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1621 µg/m³Jan 117 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb9Good
Mar11Good
Apr11Good
May10Good
Jun9Good
Jul8Good
Aug13Moderate
Sep22Moderate
Oct14Moderate
Nov9Good
Dec7Good
Location & terrain

Where is Forest Grove?

Forest Grove sits at 45.5°N, 123.1°W, 203 ft above sea level, in United States. The nearest listed city is Hillsboro, 5.6 mi away.

Topography around Forest Grove

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

Within 2 miles, the terrain around Forest Grove has only modest variations in elevation — a maximum elevation change of 331 ft around an average of 187 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 2,303 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 4,245 ft.

The land around Forest Grove is covered by trees (33%), grassland (24%) and cropland (24%) within 2 miles, trees (56%) and cropland (20%) within 10 miles, and trees (72%) within 50 miles.

2 miles
331 ft
10 miles
2,303 ft
50 miles
4,245 ft
treesgrasslandcroplandartificial surfaceswater
March weather nearby: Hillsboro 5.6 mi · Aloha 12 mi · Bethany 12 mi · Beaverton 15 mi · Newberg 17 mi · Sherwood 17 mi · Tigard 17 mi · Tualatin 19 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 Forest Grove (45.5198°, -123.1107°, elevation 203 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. 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. 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).