Newcastle weather in May

In May, Newcastle sees average daytime highs of 22°C and overnight lows near 8°C, with 18 mm of rain across 3 wet days and about 10.6 hours of daylight. It is the 10th-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 23°C in the first days to 21°C by the end. The sky is clear or mostly clear about 76% of the time in May, and the air most often feels dry.

Daylight stretches from about 11 hours at the start of May to 10 h 24 min by month's end. Set against the rest of the year, May is Newcastle's 4th-clearest and 8th-windiest month. For the whole year in context, see Newcastle's year-round climate.

Daytime high: 22°; 10th warmest
Overnight low: 8°; 4th coldest
Rainfall: 18 mm; 3 wet days
Daylight: 10 h 36 min; 6:38 AM – 5:15 PM
Cloud cover: 23%; 4th clearest
Wind: 8 km/h; 8th windiest
Solar energy: 4.1 kWh/m²
Travel score: 8.5; out of 10

Newcastle is city in KwaZulu-Natal, South Africa.

Density: 5,342/km²; people per km²
Founded: 1864

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

← April Newcastle year-round climate June →Best places to visit in May

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 23°C in the first days to 21°C by the end.

A typical May day in Newcastle reaches about 22°C in the afternoon and slips back to 8°C overnight — a 14°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 26°C. Set against its neighbours, May runs about 2°C cooler than April and about 2°C warmer than June.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Avg high (°C)	23	23	23	23	23	23	23	23	23	23	23	23	23	23	22	22	22	22	22	22	22	22	22	22	22	22	22	22	21	21	21
Avg low (°C)	10	10	10	10	9	9	9	9	9	9	9	9	8	8	8	8	8	8	8	8	7	7	7	7	7	7	7	7	6	6	6

	Avg high (°C)	Avg low (°C)
1	23	10
2	23	10
3	23	10
4	23	10
5	23	9
6	23	9
7	23	9
8	23	9
9	23	9
10	23	9
11	23	9
12	23	9
13	23	8
14	23	8
15	22	8
16	22	8
17	22	8
18	22	8
19	22	8
20	22	8
21	22	7
22	22	7
23	22	7
24	22	7
25	22	7
26	22	7
27	22	7
28	22	7
29	21	6
30	21	6
31	21	6

Newcastle weather by month

How May compares with the rest of the year at a glance. May is the 10th-warmest and 10th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	27° / 16°	141	17.6	13.6	5.4
Feb	27° / 16°	101	13.2	13	5.9
Mar	26° / 15°	99	11.8	12.2	6.6
Apr	24° / 12°	45	7.4	11.4	7.8
May	22° / 8°	18	3	10.6	8.5
Jun	20° / 5°	10	2.2	10.3	8.3
Jul	20° / 5°	13	2.1	10.4	8.3
Aug	23° / 7°	22	3.9	11	8.5
Sep	26° / 11°	40	7	11.8	7.7
Oct	26° / 13°	94	13.8	12.7	6.3
Nov	27° / 14°	120	16.5	13.4	5.5
Dec	27° / 15°	155	18.9	13.7	5.2

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 76% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 9% of May, with mostly cloudy or overcast conditions the remaining 15%. Skies tend to open up as the month goes on.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Clearer (%)	82	83	83	84	85	85	85	85	85	85	85	85	85	85	85	85	85	85	85	84	84	84	85	85	86	86	87	87	87	88	88
Cloudier (%)	18	17	17	16	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	16	16	16	15	15	14	14	13	13	13	12	12

	Clearer (%)	Cloudier (%)
1	82	18
2	83	17
3	83	17
4	84	16
5	85	15
6	85	15
7	85	15
8	85	15
9	85	15
10	85	15
11	85	15
12	85	15
13	85	15
14	85	15
15	85	15
16	85	15
17	85	15
18	85	15
19	85	15
20	84	16
21	84	16
22	84	16
23	85	15
24	85	15
25	86	14
26	86	14
27	87	13
28	87	13
29	87	13
30	88	12
31	88	12

Chance of precipitation in May

Any precipitation

Newcastle gets around 18 mm of rain over 3 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 10% and peaks near 14% on the wettest days. The odds ease toward the end of the month.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Rain chance (%)	14	13	13	13	12	12	12	12	12	12	12	11	11	11	11	10	10	10	9	9	9	8	8	7	7	7	7	7	7	7	7

	Rain chance (%)
1	14
2	13
3	13
4	13
5	12
6	12
7	12
8	12
9	12
10	12
11	12
12	11
13	11
14	11
15	11
16	10
17	10
18	10
19	9
20	9
21	9
22	8
23	8
24	7
25	7
26	7
27	7
28	7
29	7
30	7
31	7

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

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

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Dry (%)	99	99	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100
Comfortable (%)	1	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0

	Dry (%)	Comfortable (%)
1	99	1
2	99	1
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0
29	100	0
30	100	0
31	100	0

Wind in May

Winds average 8 km/h in May.

Across May, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Wind speed (km/h)	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	9	9	9
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (km/h)	Feels
1	8	calm
2	8	calm
3	8	calm
4	8	calm
5	8	calm
6	8	calm
7	8	calm
8	8	calm
9	8	calm
10	8	calm
11	8	calm
12	8	calm
13	8	calm
14	8	calm
15	8	calm
16	8	calm
17	8	calm
18	8	calm
19	8	calm
20	8	calm
21	8	calm
22	8	calm
23	8	calm
24	8	calm
25	8	calm
26	8	calm
27	8	calm
28	8	calm
29	9	calm
30	9	calm
31	9	calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 11 hours at the start of May to 10 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 36 minutes over May. Sunrise moves from 6:29 AM to 6:46 AM, and sunset from 5:26 PM to 5:09 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Daylight (h)	11.0	10.9	10.9	10.9	10.9	10.8	10.8	10.8	10.8	10.8	10.7	10.7	10.7	10.7	10.6	10.6	10.6	10.6	10.6	10.6	10.5	10.5	10.5	10.5	10.5	10.5	10.4	10.4	10.4	10.4	10.4
Sunrise (AM)	6:29	6:29	6:30	6:31	6:31	6:32	6:32	6:33	6:33	6:34	6:35	6:35	6:36	6:36	6:37	6:38	6:38	6:39	6:39	6:40	6:41	6:41	6:42	6:42	6:43	6:43	6:44	6:44	6:45	6:46	6:46
Sunset (PM)	5:26	5:25	5:25	5:24	5:23	5:22	5:21	5:21	5:20	5:19	5:19	5:18	5:17	5:17	5:16	5:15	5:15	5:14	5:14	5:13	5:13	5:12	5:12	5:12	5:11	5:11	5:10	5:10	5:10	5:10	5:09

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.0	6:29	5:26
2	10.9	6:29	5:25
3	10.9	6:30	5:25
4	10.9	6:31	5:24
5	10.9	6:31	5:23
6	10.8	6:32	5:22
7	10.8	6:32	5:21
8	10.8	6:33	5:21
9	10.8	6:33	5:20
10	10.8	6:34	5:19
11	10.7	6:35	5:19
12	10.7	6:35	5:18
13	10.7	6:36	5:17
14	10.7	6:36	5:17
15	10.6	6:37	5:16
16	10.6	6:38	5:15
17	10.6	6:38	5:15
18	10.6	6:39	5:14
19	10.6	6:39	5:14
20	10.6	6:40	5:13
21	10.5	6:41	5:13
22	10.5	6:41	5:12
23	10.5	6:42	5:12
24	10.5	6:42	5:12
25	10.5	6:43	5:11
26	10.5	6:43	5:11
27	10.4	6:44	5:10
28	10.4	6:44	5:10
29	10.4	6:45	5:10
30	10.4	6:46	5:10
31	10.4	6:46	5:09

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 4.1 kWh/m².

For context, solar energy here swings from a low near 3.68 kWh/m² to a high of 6.56 kWh/m² in December across the year — May's 4.1 kWh/m² sits near the bottom.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Solar energy (kWh/m²)	4.3	4.3	4.3	4.3	4.3	4.3	4.2	4.2	4.2	4.2	4.2	4.2	4.1	4.1	4.1	4.1	4.1	4.1	4.0	4.0	4.0	4.0	4.0	4.0	4.0	4.0	3.9	3.9	3.9	3.9	3.9
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	Solar energy (kWh/m²)	Level
1	4.3	Bright
2	4.3	Bright
3	4.3	Bright
4	4.3	Bright
5	4.3	Bright
6	4.3	Bright
7	4.2	Bright
8	4.2	Bright
9	4.2	Bright
10	4.2	Bright
11	4.2	Bright
12	4.2	Bright
13	4.1	Bright
14	4.1	Bright
15	4.1	Bright
16	4.1	Bright
17	4.1	Bright
18	4.1	Bright
19	4.0	Bright
20	4.0	Bright
21	4.0	Bright
22	4.0	Bright
23	4.0	Moderate
24	4.0	Moderate
25	4.0	Moderate
26	4.0	Moderate
27	3.9	Moderate
28	3.9	Moderate
29	3.9	Moderate
30	3.9	Moderate
31	3.9	Moderate

Planning a trip in May

Hazard calendar for Newcastle

In seasonPeak

None of Newcastle's seasonal hazards are active in May. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Newcastle'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 May a good time to visit Newcastle?

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

8.5

Sightseeing

1st-best month of the year

6.1

Beach & pool

6th-best month of the year

May is one of the better times to visit Newcastle for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Newcastle in May

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

In May, Newcastle sees daytime highs around 22°C and nights near 8°C. Worth packing: light clothes. About 3 days see rain.

light clothes

UV index in Newcastle in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May 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 Newcastle peaks around January 15 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 5 (moderate).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	15	13	11	8	6	5	5	7	9	10	12	14
Level	Extreme	Extreme	Extreme	Very high	High	Moderate	High	High	Very high	Very high	Extreme	Extreme

	UV index (midday)	Level
Jan	15	Extreme
Feb	13	Extreme
Mar	11	Extreme
Apr	8	Very high
May	6	High
Jun	5	Moderate
Jul	5	High
Aug	7	High
Sep	9	Very high
Oct	10	Very high
Nov	12	Extreme
Dec	14	Extreme

Air quality in Newcastle in May

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Newcastle is worst in September — around 54 µg/m³ PM2.5 (poor), about 5.0× the cleanest month (January, 11 µg/m³).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	11	13	16	22	27	30	35	44	54	26	15	12
Level	Good	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Poor	Poor	Moderate	Moderate	Good

	PM2.5 (µg/m³)	Level
Jan	11	Good
Feb	13	Moderate
Mar	16	Moderate
Apr	22	Moderate
May	27	Moderate
Jun	30	Moderate
Jul	35	Moderate
Aug	44	Poor
Sep	54	Poor
Oct	26	Moderate
Nov	15	Moderate
Dec	12	Good

Location & terrain

Where is Newcastle?

Newcastle sits at 27.8°S, 29.9°E, 1,195 m above sea level, in South Africa. The nearest listed city is Volksrust, 44 km away.

Topography around Newcastle

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

Within 3 km, the terrain around Newcastle has only modest variations in elevation — a maximum elevation change of 76 m around an average of 1,205 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 833 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,427 m.

The land around Newcastle is covered by grassland (53%) and artificial surfaces (35%) within 3 km, grassland (77%) within 16 km, and grassland (80%) within 80 km.

3 km

76 m

grassland 53%

16 km

833 m

grassland 77%

80 km

1,427 m

grassland 80%

treesshrubsgrasslandcroplandartificial surfacesbare terrain

← April Newcastle year-round climate June →Best places to visit in May

May weather nearby: Volksrust 44 km · Glencoe 51 km · Dundee 54 km · Daggakraal 70 km · Mondlo 81 km · Vrede 84 km · Vryheid 85 km · Ladysmith 90 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

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 Newcastle (-27.758°, 29.9318°, elevation 1,195 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).

	Avg high (°C)	Avg low (°C)
1	23	10
2	23	10
3	23	10
4	23	10
5	23	9
6	23	9
7	23	9
8	23	9
9	23	9
10	23	9
11	23	9
12	23	9
13	23	8
14	23	8
15	22	8
16	22	8
17	22	8
18	22	8
19	22	8
20	22	8
21	22	7
22	22	7
23	22	7
24	22	7
25	22	7
26	22	7
27	22	7
28	22	7
29	21	6
30	21	6
31	21	6

	Clearer (%)	Cloudier (%)
1	82	18
2	83	17
3	83	17
4	84	16
5	85	15
6	85	15
7	85	15
8	85	15
9	85	15
10	85	15
11	85	15
12	85	15
13	85	15
14	85	15
15	85	15
16	85	15
17	85	15
18	85	15
19	85	15
20	84	16
21	84	16
22	84	16
23	85	15
24	85	15
25	86	14
26	86	14
27	87	13
28	87	13
29	87	13
30	88	12
31	88	12

	Rain chance (%)
1	14
2	13
3	13
4	13
5	12
6	12
7	12
8	12
9	12
10	12
11	12
12	11
13	11
14	11
15	11
16	10
17	10
18	10
19	9
20	9
21	9
22	8
23	8
24	7
25	7
26	7
27	7
28	7
29	7
30	7
31	7

	Dry (%)	Comfortable (%)
1	99	1
2	99	1
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0
29	100	0
30	100	0
31	100	0

	Avg high (°C)	Avg low (°C)
1	23	10
2	23	10
3	23	10
4	23	10
5	23	9
6	23	9
7	23	9
8	23	9
9	23	9
10	23	9
11	23	9
12	23	9
13	23	8
14	23	8
15	22	8
16	22	8
17	22	8
18	22	8
19	22	8
20	22	8
21	22	7
22	22	7
23	22	7
24	22	7
25	22	7
26	22	7
27	22	7
28	22	7
29	21	6
30	21	6
31	21	6

	Clearer (%)	Cloudier (%)
1	82	18
2	83	17
3	83	17
4	84	16
5	85	15
6	85	15
7	85	15
8	85	15
9	85	15
10	85	15
11	85	15
12	85	15
13	85	15
14	85	15
15	85	15
16	85	15
17	85	15
18	85	15
19	85	15
20	84	16
21	84	16
22	84	16
23	85	15
24	85	15
25	86	14
26	86	14
27	87	13
28	87	13
29	87	13
30	88	12
31	88	12

	Rain chance (%)
1	14
2	13
3	13
4	13
5	12
6	12
7	12
8	12
9	12
10	12
11	12
12	11
13	11
14	11
15	11
16	10
17	10
18	10
19	9
20	9
21	9
22	8
23	8
24	7
25	7
26	7
27	7
28	7
29	7
30	7
31	7

	Dry (%)	Comfortable (%)
1	99	1
2	99	1
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0
29	100	0
30	100	0
31	100	0

	Avg high (°C)	Avg low (°C)
1	23	10
2	23	10
3	23	10
4	23	10
5	23	9
6	23	9
7	23	9
8	23	9
9	23	9
10	23	9
11	23	9
12	23	9
13	23	8
14	23	8
15	22	8
16	22	8
17	22	8
18	22	8
19	22	8
20	22	8
21	22	7
22	22	7
23	22	7
24	22	7
25	22	7
26	22	7
27	22	7
28	22	7
29	21	6
30	21	6
31	21	6

	Clearer (%)	Cloudier (%)
1	82	18
2	83	17
3	83	17
4	84	16
5	85	15
6	85	15
7	85	15
8	85	15
9	85	15
10	85	15
11	85	15
12	85	15
13	85	15
14	85	15
15	85	15
16	85	15
17	85	15
18	85	15
19	85	15
20	84	16
21	84	16
22	84	16
23	85	15
24	85	15
25	86	14
26	86	14
27	87	13
28	87	13
29	87	13
30	88	12
31	88	12

	Rain chance (%)
1	14
2	13
3	13
4	13
5	12
6	12
7	12
8	12
9	12
10	12
11	12
12	11
13	11
14	11
15	11
16	10
17	10
18	10
19	9
20	9
21	9
22	8
23	8
24	7
25	7
26	7
27	7
28	7
29	7
30	7
31	7

	Dry (%)	Comfortable (%)
1	99	1
2	99	1
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0
29	100	0
30	100	0
31	100	0