Heilbron weather in March

In March, Heilbron sees average daytime highs of 25°C and overnight lows near 14°C, with 81 mm of rain across 11.1 wet days and about 12.2 hours of daylight. It is the 6th-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 26°C in the first days to 24°C by the end. The sky is clear or mostly clear about 49% of the time in March, and the air most often feels dry.

Daylight stretches from about 12 h 36 min at the start of March to 11 h 48 min by month's end. Set against the rest of the year, March is Heilbron's 8th-clearest and 10th-windiest month. For the whole year in context, see Heilbron's year-round climate.

Daytime high
25°
6th warmest
Overnight low
14°
9th coldest
Rainfall
81 mm
11.1 wet days
Daylight
12 h 12 min
6:12 AM – 6:24 PM
Cloud cover
44%
8th clearest
Wind
10 km/h
10th windiest
Solar energy
5.65 kWh/m²
Travel score
6.9
out of 10

Heilbron is town in the Free State, South Africa.

Founded
1872

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

Temperature in March

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 26°C in the first days to 24°C by the end.

A typical March day in Heilbron reaches about 25°C in the afternoon and slips back to 14°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 29°C. Set against its neighbours, March runs about 1°C cooler than February and about 2°C warmer than April.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12615
22615
32615
42615
52615
62615
72615
82615
92615
102615
112615
122615
132615
142514
152514
162514
172514
182514
192514
202514
212514
222514
232514
242514
252514
262513
272513
282513
292413
302413
312413

How March really feels in Heilbron

Once humidity and wind are folded in, March averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
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.

Heilbron weather by month

How March compares with the rest of the year at a glance. March is the 6th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 16°1241513.55.9
Feb27° / 16°8712.6136.2
Mar25° / 14°8111.112.26.9
Apr23° / 11°436.911.47.7
May21° / 193.110.78.1
Jun18° / 101.710.37.8
Jul18° / 61.110.57.9
Aug21° / 152.4118.4
Sep25° / 10°203.211.88.6
Oct26° / 13°769.812.77.1
Nov26° / 14°9812.513.36.4
Dec27° / 15°13916.613.75.8

Cloud cover in March

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 49% of the time in March.

Beyond those clear spells, partly cloudy skies cover about 23% of March, with mostly cloudy or overcast conditions the remaining 28%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17426
27426
37426
47426
57327
67327
77327
87327
97327
107327
117228
127228
137228
147129
157129
167129
177030
187030
197030
207030
217030
227030
237129
247129
257129
267129
277129
287129
297129
307129
317030

Chance of precipitation in March

Any precipitation

Heilbron gets around 81 mm of rain over 11.1 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 36% and peaks near 40% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
140
239
338
438
537
637
737
837
937
1037
1137
1237
1338
1438
1538
1639
1739
1839
1939
2038
2137
2236
2335
2434
2533
2632
2731
2830
2929
3028
3128

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 53% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
1394417
2404416
3424315
4434314
5454313
6464212
7474211
8484210
948429
1049429
1149428
1250428
1350437
1450437
1550437
1651436
1751436
1851436
1952426
2054415
2155405
2256395
2357385
2459374
2560364
2662344
2764333
2866313
2968293
3071272
3173252

Wind in March

Winds average 10 km/h in March.

Across March, daily wind ranges from about 10 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in March

DaylightNight

Daylight runs from about 12 h 36 min at the start of March to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 48 minutes over March. Sunrise moves from 6:03 AM to 6:20 AM, and sunset from 6:40 PM to 6:07 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.66:036:40
212.66:046:39
312.66:046:38
412.56:056:37
512.56:066:36
612.56:066:35
712.46:076:34
812.46:076:32
912.46:086:31
1012.46:086:30
1112.36:096:29
1212.36:106:28
1312.36:106:27
1412.36:116:26
1512.26:116:25
1612.26:126:24
1712.26:126:23
1812.16:136:22
1912.16:136:20
2012.16:146:19
2112.16:146:18
2212.06:156:17
2312.06:156:16
2412.06:166:15
2512.06:166:14
2611.96:176:12
2711.96:176:11
2811.96:186:10
2911.86:196:09
3011.86:196:08
3111.86:206:07

Solar energy in March

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in March, about 5.65 kWh/m².

For context, solar energy here swings from a low near 3.82 kWh/m² to a high of 7.07 kWh/m² in December across the year — March's 5.65 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.2Intense
26.1Intense
36.1Intense
46.1Intense
56.1Intense
66.0Intense
76.0Intense
86.0Bright
95.9Bright
105.9Bright
115.8Bright
125.8Bright
135.8Bright
145.7Bright
155.7Bright
165.6Bright
175.6Bright
185.5Bright
195.5Bright
205.5Bright
215.4Bright
225.4Bright
235.4Bright
245.3Bright
255.3Bright
265.3Bright
275.3Bright
285.2Bright
295.2Bright
305.2Bright
315.2Bright
Planning a trip in March

Hazard calendar for Heilbron

In seasonPeak

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

Heilbron's rainy season runs October–March, 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 Heilbron?

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

6.9
Sightseeing
8th-best month of the year
6.3
Beach & pool
3rd-best month of the year

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

What to pack for Heilbron in March

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

In March, Heilbron sees daytime highs around 25°C and nights near 14°C. Worth packing: light clothes, rain gear and sun protection. About 11 days see rain.

light clothesrain gearsun protection

UV index in Heilbron in March

LowModerateHighVery highExtreme

Clear-sky midday UV in March peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Heilbron peaks around January 14 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 5 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 14UV 15Jun 20UV 5
UV index (midday)Level
Jan15Extreme
Feb13Extreme
Mar11Extreme
Apr8Very high
May6High
Jun5Moderate
Jul5High
Aug7Very high
Sep9Very high
Oct10Extreme
Nov12Extreme
Dec14Extreme

Air quality in Heilbron 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 Heilbron is worst in July — around 103 µg/m³ PM2.5 (unhealthy), about 4.4× the cleanest month (January, 24 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorUnhealthyPoorModerateJul 11103 µg/m³Jan 1124 µg/m³
PM2.5 (µg/m³)Level
Jan24Moderate
Feb32Moderate
Mar48Poor
Apr64Unhealthy
May88Unhealthy
Jun100Unhealthy
Jul103Unhealthy
Aug83Unhealthy
Sep65Unhealthy
Oct44Poor
Nov31Moderate
Dec25Moderate
Location & terrain

Where is Heilbron?

Heilbron sits at 27.3°S, 28.0°E, 1,539 m above sea level, in South Africa. The nearest listed city is Koppies, 39 km away.

Topography around Heilbron

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Heilbron.

Within 3 km, the terrain around Heilbron has only modest variations in elevation — a maximum elevation change of 83 m around an average of 1,555 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 268 m; within 80 km, significant variations in elevation — a maximum elevation change of 455 m.

The land around Heilbron is covered by grassland (56%) and cropland (22%) within 3 km, grassland (51%) and cropland (47%) within 16 km, and grassland (56%) and cropland (40%) within 80 km.

3 km
83 m
16 km
268 m
80 km
455 m
treesshrubsgrasslandcroplandartificial surfaceswater
March weather nearby: Koppies 39 km · Deneysville 45 km · Mamafubedu 46 km · Frankfort 52 km · Sasolburg 54 km · Vanderbijlpark 65 km · Parys 66 km · Vredefort 67 km

South Africa travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / M / N
230 V · 50 Hz
Prices
≈ 41% of US
price level, 2025
GDP per capita
$6,598
2025
Happiness
5.0 / 10
World Happiness, 2025
Safe drinking water
68%
of population, 2024
Homicide rate
43.7
per 100k, 2022
Road deaths
22.2
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Very high
EF EPI 602
Religion
Christian 86%or other traditional African religions 5%nothing in particular 5%Muslim 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 Heilbron (-27.2812°, 27.9709°, elevation 1,539 m), 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).