Jamestown weather in May

In May, Jamestown sees average daytime highs of 23°C and overnight lows near 22°C, with 4 mm of rain across 1.1 wet days and about 11.3 hours of daylight. It is the 4th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 23°C through the month. The sky is clear or mostly clear about 29% of the time in May, and the air most often feels humid.

Daylight stretches from about 11 h 24 min at the start of May to 11 h 06 min by month's end. Set against the rest of the year, May is Jamestown's 6th-clearest and 9th-windiest month. For the whole year in context, see Jamestown's year-round climate.

Daytime high: 23°; 4th warmest
Overnight low: 22°; 9th coldest
Rainfall: 4 mm; 1.1 wet days
Daylight: 11 h 18 min; 6:41 AM – 5:57 PM
Cloud cover: 52%; 6th clearest
Wind: 24 km/h; 9th windiest
Solar energy: 4.49 kWh/m²
Travel score: 8.3; out of 10

Jamestown is capital of Saint Helena.

Density: 177/km²; people per km²
Founded: 1659

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

← April Jamestown 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

Day-to-day highs hold fairly steady near 23°C through the month.

A typical May day in Jamestown reaches about 23°C in the afternoon and slips back to 22°C overnight — a 1°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 23°C. Set against its neighbours, May runs about 1°C cooler than April and about 1°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	23	23	23	23	23	23	23	23	23	23	23	23	23	22	22	22	22
Avg low (°C)	23	23	23	23	23	23	23	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22

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

Jamestown weather by month

How May compares with the rest of the year at a glance. May is the 4th-warmest and 3rd-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	23° / 22°	2	0.4	12.8	8.6
Feb	24° / 23°	3	0.6	12.5	8.8
Mar	24° / 24°	5	1.4	12.1	8.7
Apr	24° / 23°	3	0.6	11.7	8.7
May	23° / 22°	4	1.1	11.3	8.3
Jun	22° / 21°	5	1.1	11.1	7.9
Jul	21° / 20°	3	0.5	11.1	7.7
Aug	20° / 19°	2	0.3	11.5	7.4
Sep	20° / 19°	1	0.1	11.9	7.3
Oct	20° / 19°	1	0.1	12.4	7.4
Nov	20° / 20°	1	0	12.7	7.7
Dec	21° / 21°	1	0	12.9	8.2

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 29% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 36% of May, with mostly cloudy or overcast conditions the remaining 36%. Skies tend to cloud over 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 (%)	68	67	67	67	67	67	67	67	67	66	66	66	65	65	64	64	63	63	62	62	62	62	61	61	61	61	61	62	61	61	60
Cloudier (%)	32	33	33	33	33	33	33	33	33	34	34	34	35	35	36	36	37	37	38	38	38	38	39	39	39	39	39	38	39	39	40

	Clearer (%)	Cloudier (%)
1	68	32
2	67	33
3	67	33
4	67	33
5	67	33
6	67	33
7	67	33
8	67	33
9	67	33
10	66	34
11	66	34
12	66	34
13	65	35
14	65	35
15	64	36
16	64	36
17	63	37
18	63	37
19	62	38
20	62	38
21	62	38
22	62	38
23	61	39
24	61	39
25	61	39
26	61	39
27	61	39
28	62	38
29	61	39
30	61	39
31	60	40

Chance of precipitation in May

Any precipitation

Jamestown gets around 4 mm of rain over 1.1 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 3% and peaks near 6% on the wettest days.

	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 (%)	1	1	1	1	1	1	1	1	2	2	2	2	2	2	2	3	3	3	4	4	4	5	5	5	6	6	6	6	6	6	6

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

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the humid band about 72% of days. Sticky, muggy-or-worse air turns up on roughly 18% of them.

	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
Comfortable (%)	3	3	3	3	4	4	4	5	5	6	6	7	7	8	8	9	9	10	11	11	12	13	13	14	15	16	17	18	19	21	22
Humid (%)	61	62	64	66	66	68	69	69	71	71	72	72	73	74	75	74	75	75	75	76	76	76	76	76	76	76	76	76	75	74	73
Muggy (%)	36	35	33	31	30	28	27	26	24	23	22	21	20	18	17	17	16	15	14	13	12	11	11	10	9	8	7	6	6	5	5

	Comfortable (%)	Humid (%)	Muggy (%)
1	3	61	36
2	3	62	35
3	3	64	33
4	3	66	31
5	4	66	30
6	4	68	28
7	4	69	27
8	5	69	26
9	5	71	24
10	6	71	23
11	6	72	22
12	7	72	21
13	7	73	20
14	8	74	18
15	8	75	17
16	9	74	17
17	9	75	16
18	10	75	15
19	11	75	14
20	11	76	13
21	12	76	12
22	13	76	11
23	13	76	11
24	14	76	10
25	15	76	9
26	16	76	8
27	17	76	7
28	18	76	6
29	19	75	6
30	21	74	5
31	22	73	5

Wind in May

Winds average 24 km/h in May.

Across May, daily wind ranges from about 24 km/h on the calmest days to 26 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)	25	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	25	25	25	25	25	25	25	26	26	26	26	26
Feels	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy

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

Sunrise & sunset in May

DaylightNight

Daylight runs from about 11 h 24 min at the start of May to 11 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 18 minutes over May. Sunrise moves from 6:37 AM to 6:46 AM, and sunset from 6:03 PM to 5:54 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)	11.4	11.4	11.4	11.4	11.4	11.4	11.4	11.3	11.3	11.3	11.3	11.3	11.3	11.3	11.3	11.3	11.2	11.2	11.2	11.2	11.2	11.2	11.2	11.2	11.2	11.2	11.2	11.2	11.1	11.1	11.1
Sunrise (AM)	6:37	6:37	6:38	6:38	6:38	6:38	6:39	6:39	6:39	6:39	6:40	6:40	6:40	6:41	6:41	6:41	6:42	6:42	6:42	6:43	6:43	6:43	6:44	6:44	6:44	6:45	6:45	6:45	6:46	6:46	6:46
Sunset (PM)	6:03	6:03	6:02	6:02	6:01	6:01	6:00	6:00	5:59	5:59	5:59	5:58	5:58	5:58	5:57	5:57	5:57	5:56	5:56	5:56	5:56	5:55	5:55	5:55	5:55	5:55	5:55	5:54	5:54	5:54	5:54

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.4	6:37	6:03
2	11.4	6:37	6:03
3	11.4	6:38	6:02
4	11.4	6:38	6:02
5	11.4	6:38	6:01
6	11.4	6:38	6:01
7	11.4	6:39	6:00
8	11.3	6:39	6:00
9	11.3	6:39	5:59
10	11.3	6:39	5:59
11	11.3	6:40	5:59
12	11.3	6:40	5:58
13	11.3	6:40	5:58
14	11.3	6:41	5:58
15	11.3	6:41	5:57
16	11.3	6:41	5:57
17	11.2	6:42	5:57
18	11.2	6:42	5:56
19	11.2	6:42	5:56
20	11.2	6:43	5:56
21	11.2	6:43	5:56
22	11.2	6:43	5:55
23	11.2	6:44	5:55
24	11.2	6:44	5:55
25	11.2	6:44	5:55
26	11.2	6:45	5:55
27	11.2	6:45	5:55
28	11.2	6:45	5:54
29	11.1	6:46	5:54
30	11.1	6:46	5:54
31	11.1	6:46	5:54

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 4.49 kWh/m².

For context, solar energy here swings from a low near 3.89 kWh/m² to a high of 7.11 kWh/m² in January across the year — May's 4.49 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)	4.9	4.9	4.9	4.8	4.8	4.8	4.8	4.7	4.7	4.7	4.7	4.6	4.6	4.6	4.5	4.5	4.5	4.4	4.4	4.4	4.3	4.3	4.3	4.3	4.2	4.2	4.2	4.2	4.2	4.1	4.1
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	4.9	Bright
2	4.9	Bright
3	4.9	Bright
4	4.8	Bright
5	4.8	Bright
6	4.8	Bright
7	4.8	Bright
8	4.7	Bright
9	4.7	Bright
10	4.7	Bright
11	4.7	Bright
12	4.6	Bright
13	4.6	Bright
14	4.6	Bright
15	4.5	Bright
16	4.5	Bright
17	4.5	Bright
18	4.4	Bright
19	4.4	Bright
20	4.4	Bright
21	4.3	Bright
22	4.3	Bright
23	4.3	Bright
24	4.3	Bright
25	4.2	Bright
26	4.2	Bright
27	4.2	Bright
28	4.2	Bright
29	4.2	Bright
30	4.1	Bright
31	4.1	Bright

Planning a trip in May

Is May a good time to visit Jamestown?

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

8.3

Sightseeing

5th-best month of the year

6.4

Beach & pool

5th-best month of the year

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

What to pack for Jamestown in May

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

In May, Jamestown sees daytime highs around 23°C and nights near 22°C. Worth packing: light clothes and a windbreaker.

light clothesa windbreaker

Sea temperature near Jamestown in May

The nearest coast averages about 24°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in March at about 25°C and coldest in October near 20°C.

The water stays above 20°C all year — warm enough for a swim any month.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°C)	23	24	25	25	24	23	22	21	20	20	21	22
Comfort	Refreshing	Warm	Warm	Warm	Refreshing	Refreshing	Refreshing	Refreshing	Refreshing	Refreshing	Refreshing	Refreshing

	Sea temperature (°C)	Comfort
Jan	23	Refreshing
Feb	24	Warm
Mar	25	Warm
Apr	25	Warm
May	24	Refreshing
Jun	23	Refreshing
Jul	22	Refreshing
Aug	21	Refreshing
Sep	20	Refreshing
Oct	20	Refreshing
Nov	21	Refreshing
Dec	22	Refreshing

UV index in Jamestown in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Jamestown peaks around January 20 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 8 (very high).

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)	14	13	13	11	9	8	8	8	10	11	13	12
Level	Extreme	Extreme	Extreme	Extreme	Very high	Very high	Very high	Very high	Very high	Extreme	Extreme	Extreme

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

Location & terrain

Where is Jamestown?

Jamestown sits at 15.9°S, 5.7°W, 10 m above sea level, in Saint Helena. The nearest listed city is Tômbua, 1,878 km away.

Topography around Jamestown

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

Within 3 km, the terrain around Jamestown has significant variations in elevation — a maximum elevation change of 581 m around an average of 155 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 795 m; within 80 km, large variations in elevation — a maximum elevation change of 766 m.

The land around Jamestown is covered by water (44%) and shrubs (27%) within 3 km, water (85%) within 16 km, and water (97%) within 80 km.

3 km

581 m

water 44%

16 km

795 m

water 85%

80 km

766 m

water 97%

treesshrubsgrasslandcroplandartificial surfacesbare terrainwater

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

May weather nearby: Tômbua 1,878 km · Mossamedes 1,915 km · Virei 1,997 km · Camucuio 2,045 km · Dombe Grande 2,053 km · Lubango 2,062 km · Baía Farta 2,071 km · Navegantes 2,092 km

Saint Helena travel facts

Power plugs: Type G; 230 V · 50 Hz

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 Jamestown (-15.9249°, -5.7182°, elevation 10 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. 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. 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	23
2	23	23
3	23	23
4	23	23
5	23	23
6	23	23
7	23	23
8	23	22
9	23	22
10	23	22
11	23	22
12	23	22
13	23	22
14	23	22
15	23	22
16	23	22
17	23	22
18	23	22
19	23	22
20	23	22
21	23	22
22	23	22
23	23	22
24	23	22
25	23	22
26	23	22
27	23	22
28	22	22
29	22	22
30	22	22
31	22	22

	Clearer (%)	Cloudier (%)
1	68	32
2	67	33
3	67	33
4	67	33
5	67	33
6	67	33
7	67	33
8	67	33
9	67	33
10	66	34
11	66	34
12	66	34
13	65	35
14	65	35
15	64	36
16	64	36
17	63	37
18	63	37
19	62	38
20	62	38
21	62	38
22	62	38
23	61	39
24	61	39
25	61	39
26	61	39
27	61	39
28	62	38
29	61	39
30	61	39
31	60	40

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

	Comfortable (%)	Humid (%)	Muggy (%)
1	3	61	36
2	3	62	35
3	3	64	33
4	3	66	31
5	4	66	30
6	4	68	28
7	4	69	27
8	5	69	26
9	5	71	24
10	6	71	23
11	6	72	22
12	7	72	21
13	7	73	20
14	8	74	18
15	8	75	17
16	9	74	17
17	9	75	16
18	10	75	15
19	11	75	14
20	11	76	13
21	12	76	12
22	13	76	11
23	13	76	11
24	14	76	10
25	15	76	9
26	16	76	8
27	17	76	7
28	18	76	6
29	19	75	6
30	21	74	5
31	22	73	5

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

	Clearer (%)	Cloudier (%)
1	68	32
2	67	33
3	67	33
4	67	33
5	67	33
6	67	33
7	67	33
8	67	33
9	67	33
10	66	34
11	66	34
12	66	34
13	65	35
14	65	35
15	64	36
16	64	36
17	63	37
18	63	37
19	62	38
20	62	38
21	62	38
22	62	38
23	61	39
24	61	39
25	61	39
26	61	39
27	61	39
28	62	38
29	61	39
30	61	39
31	60	40

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

	Comfortable (%)	Humid (%)	Muggy (%)
1	3	61	36
2	3	62	35
3	3	64	33
4	3	66	31
5	4	66	30
6	4	68	28
7	4	69	27
8	5	69	26
9	5	71	24
10	6	71	23
11	6	72	22
12	7	72	21
13	7	73	20
14	8	74	18
15	8	75	17
16	9	74	17
17	9	75	16
18	10	75	15
19	11	75	14
20	11	76	13
21	12	76	12
22	13	76	11
23	13	76	11
24	14	76	10
25	15	76	9
26	16	76	8
27	17	76	7
28	18	76	6
29	19	75	6
30	21	74	5
31	22	73	5

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

	Clearer (%)	Cloudier (%)
1	68	32
2	67	33
3	67	33
4	67	33
5	67	33
6	67	33
7	67	33
8	67	33
9	67	33
10	66	34
11	66	34
12	66	34
13	65	35
14	65	35
15	64	36
16	64	36
17	63	37
18	63	37
19	62	38
20	62	38
21	62	38
22	62	38
23	61	39
24	61	39
25	61	39
26	61	39
27	61	39
28	62	38
29	61	39
30	61	39
31	60	40

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

	Comfortable (%)	Humid (%)	Muggy (%)
1	3	61	36
2	3	62	35
3	3	64	33
4	3	66	31
5	4	66	30
6	4	68	28
7	4	69	27
8	5	69	26
9	5	71	24
10	6	71	23
11	6	72	22
12	7	72	21
13	7	73	20
14	8	74	18
15	8	75	17
16	9	74	17
17	9	75	16
18	10	75	15
19	11	75	14
20	11	76	13
21	12	76	12
22	13	76	11
23	13	76	11
24	14	76	10
25	15	76	9
26	16	76	8
27	17	76	7
28	18	76	6
29	19	75	6
30	21	74	5
31	22	73	5