St. Johns weather in March

In March, St. Johns sees average daytime highs of 72°F and overnight lows near 56°F, with 2.8 in of rain across 7.3 wet days and about 11.8 hours of daylight. It is the 9th-warmest and 6th-wettest month of the year here.

Highs climb over the month, from about 70°F in the first days to 74°F by the end. The sky is clear or mostly clear about 40% of the time in March, and the air most often feels dry.

Daylight stretches from about 11 h 18 min at the start of March to 12 h 12 min by month's end. Set against the rest of the year, March is St. Johns's 3rd-clearest and 1st-windiest month. For the whole year in context, see St. Johns's year-round climate.

Daytime high
72°
9th warmest
Overnight low
56°
4th coldest
Rainfall
2.8 in
7.3 wet days
Daylight
11 h 48 min
6:43 AM – 6:29 PM
Cloud cover
51%
3rd clearest
Wind
8 mph
1st windiest
Solar energy
5 kWh/m²
Travel score
7.2
out of 10

St. Johns is unincorporated community in St. Johns County, Florida, United States.

Founded
2005

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 70°F in the first days to 74°F by the end.

A typical March day in St. Johns reaches about 72°F in the afternoon and slips back to 56°F overnight — a 16°F spread between the day's warmth and the night's chill. On most days the high lands between 62°F and 80°F. Set against its neighbours, March runs about 4°F warmer than February and about 5°F cooler than April.

40°50°60°70°80°151015202531
Avg high (°F)Avg low (°F)
16954
27054
37054
47054
57054
67054
77054
87054
97054
107154
117155
127155
137155
147155
157155
167156
177256
187256
197256
207257
217357
227357
237357
247358
257358
267458
277458
287458
297459
307459
317459

How March really feels in St. Johns

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.

St. Johns weather by month

How March compares with the rest of the year at a glance. March is the 9th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan65° / 49°2.57.710.36.4
Feb67° / 52°2.56.910.96.6
Mar72° / 56°2.87.311.87.2
Apr77° / 62°2.16.712.77.5
May83° / 69°2.58.713.56.3
Jun86° / 74°5.017.613.94.0
Jul88° / 76°4.820.113.73.4
Aug87° / 76°5.721.213.13.4
Sep84° / 74°5.517.212.24.5
Oct79° / 67°3.29.811.36.8
Nov72° / 58°1.76.210.57.4
Dec67° / 53°2.26.710.16.7

Cloud cover in March

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 40% of the time in March.

Beyond those clear spells, partly cloudy skies cover about 16% of March, with mostly cloudy or overcast conditions the remaining 44%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15248
25347
35347
45347
55446
65446
75545
85545
95545
105545
115545
125545
135545
145545
155545
165545
175545
185644
195644
205644
215743
225743
235743
245743
255743
265842
275842
285842
295842
305842
315842

Chance of precipitation in March

Any precipitation

St. Johns gets around 2.8 in of rain over 7.3 wet days in March. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 23% and peaks near 25% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
125
224
324
423
523
623
722
822
922
1022
1122
1222
1322
1422
1522
1622
1723
1823
1923
2023
2124
2224
2324
2424
2524
2624
2724
2824
2924
3024
3124

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 48% of days. Sticky, muggy-or-worse air turns up on roughly 6% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
15520214
25620204
35720203
45820193
55721193
65821183
75821183
85722183
95722183
105523184
115523184
125324194
135324194
145125204
155125204
164926214
174826215
184726225
194626225
204527236
214427246
224327247
234227257
244126257
254026258
263926269
273926269
2838262610
2938262610
3037252711
3136252711

Wind in March

Winds average 8 mph in March, the windiest month of the year.

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

051015151015202531
Wind speed (mph)Feels
18light breeze
28light breeze
38light breeze
48light breeze
58light breeze
68light breeze
78light breeze
88light breeze
98light breeze
108light breeze
118light breeze
128light breeze
138light breeze
148light breeze
158light breeze
168light breeze
178light breeze
188light breeze
198light breeze
208light breeze
218light breeze
228light breeze
238light breeze
248light breeze
258light breeze
268light breeze
278light breeze
288light breeze
298light breeze
308light breeze
318light breeze

Sunrise & sunset in March

DaylightNight

Daylight runs from about 11 h 18 min at the start of March to 12 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 54 minutes over March. Sunrise moves from 7:00 AM to 6:24 AM, and sunset from 6:19 PM to 6:38 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.37:006:19
211.36:596:20
311.46:586:20
411.46:576:21
511.46:566:22
611.56:546:22
711.56:536:23
811.56:526:24
911.66:516:24
1011.66:506:25
1111.66:496:26
1211.76:476:26
1311.76:466:27
1411.76:456:28
1511.76:446:28
1611.86:436:29
1711.86:416:30
1811.86:406:30
1911.96:396:31
2011.96:386:32
2111.96:366:32
2212.06:356:33
2312.06:346:33
2412.06:336:34
2512.16:316:35
2612.16:306:35
2712.16:296:36
2812.16:286:37
2912.26:266:37
3012.26:256:38
3112.26:246:38

Solar energy in March

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in March, about 5 kWh/m².

For context, solar energy here swings from a low near 2.83 kWh/m² to a high of 6.44 kWh/m² in May across the year — March's 5 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
14.4Bright
24.5Bright
34.5Bright
44.6Bright
54.6Bright
64.7Bright
74.7Bright
84.8Bright
94.8Bright
104.8Bright
114.9Bright
124.9Bright
134.9Bright
145.0Bright
155.0Bright
165.0Bright
175.0Bright
185.1Bright
195.1Bright
205.1Bright
215.2Bright
225.2Bright
235.2Bright
245.3Bright
255.3Bright
265.3Bright
275.4Bright
285.4Bright
295.4Bright
305.5Bright
315.5Bright
Planning a trip in March

Hazard calendar for St. Johns

In seasonPeak

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

St. Johns sits in the Atlantic hurricane belt; the season peaks August–October.

St. Johns's rainy season runs June–October, when most of the year's rain falls.

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

Is March a good time to visit St. Johns?

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

7.2
Sightseeing
3rd-best month of the year
5.1
Beach & pool
7th-best month of the year

March is one of the better times to visit St. Johns for general sightseeing.

What to pack for St. Johns in March

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

In March, St. Johns sees daytime highs around 72°F and nights near 56°F. Worth packing: light clothes and sun protection. About 7 days see rain.

light clothessun protection

Sea temperature near St. Johns in March

The nearest coast averages about 63°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 23 mi away) is warmest in August at about 82°F and coldest in February near 61°F.

It's comfortable for a long swim from Apr 13 to Nov 28 — about 7.6 months when the water holds above 68°F.

60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan62Cool
Feb61Cool
Mar63Cool
Apr69Refreshing
May75Refreshing
Jun80Warm
Jul82Warm
Aug82Tropical
Sep82Warm
Oct78Warm
Nov70Refreshing
Dec65Cool

UV index in St. Johns in March

LowModerateHighVery highExtreme

Clear-sky midday UV in March 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 St. Johns peaks around June 21 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 4 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJun 21UV 11Dec 19UV 4
UV index (midday)Level
Jan4Moderate
Feb6High
Mar7Very high
Apr7High
May9Very high
Jun11Extreme
Jul10Extreme
Aug10Very high
Sep8Very high
Oct6High
Nov5Moderate
Dec4Moderate

Air quality in St. Johns 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 St. Johns is worst in July — around 18 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (December, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1618 µg/m³Dec 138 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb13Moderate
Mar12Moderate
Apr13Moderate
May14Moderate
Jun16Moderate
Jul18Moderate
Aug16Moderate
Sep12Good
Oct8Good
Nov8Good
Dec7Good
Location & terrain

Where is St. Johns?

St. Johns sits at 30.1°N, 81.5°W, 33 ft above sea level, in United States. The nearest listed city is Fruit Cove, 6.2 mi away.

Topography around St. Johns

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

Within 2 miles, the terrain around St. Johns has only modest variations in elevation — a maximum elevation change of 118 ft around an average of 39 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 144 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 308 ft.

The land around St. Johns is covered by trees (65%) within 2 miles, trees (62%) within 10 miles, and trees (59%) and water (28%) within 50 miles.

2 miles
118 ft
10 miles
144 ft
50 miles
308 ft
treesgrasslandcroplandartificial surfaceswaterwetland
March weather nearby: Fruit Cove 6.2 mi · Fleming Island 11 mi · Palm Valley 12 mi · Lakeside 14 mi · Ponte Vedra Beach 15 mi · Jacksonville Beach 17 mi · Oakleaf Plantation 18 mi · Jacksonville 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 St. Johns (30.0815°, -81.5477°, elevation 33 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. 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).