Lethem weather in May

In May, Lethem sees average daytime highs of 29°C and overnight lows near 22°C, with 386 mm of rain across 27 wet days and about 12.2 hours of daylight. It is the 10th-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 3% of the time in May, and the air most often feels oppressive.

Daylight stretches from about 12 h 06 min at the start of May to 12 h 12 min by month's end. Set against the rest of the year, May is Lethem's 12th-clearest and 8th-windiest month. For the whole year in context, see Lethem's year-round climate.

Daytime high: 29°; 10th warmest
Overnight low: 22°; 6th coldest
Rainfall: 386 mm; 27 wet days
Daylight: 12 h 12 min; 5:51 AM – 6:00 PM
Cloud cover: 84%; 12th clearest
Wind: 8 km/h; 8th windiest
Solar energy: 3.84 kWh/m²
Travel score: 3.2; out of 10

Lethem is Regional Capital of Alto Tcutu-Upper Essequibo, which is controlled by Guyana and claimed by Venezuela.

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

← April Lethem 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 29°C through the month.

A typical May day in Lethem reaches about 29°C in the afternoon and slips back to 22°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 32°C. Set against its neighbours, May runs about 2°C cooler than April and on par with 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)	30	30	30	30	30	30	30	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29
Avg low (°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	22	22	22

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

How May really feels in Lethem

Once humidity and wind are folded in, May averages 31 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

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

The story in May is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Lethem weather by month

How May compares with the rest of the year at a glance. May is the 10th-warmest and 1st-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	31° / 22°	46	9.3	11.8	4.6
Feb	31° / 22°	47	8.2	11.9	4.5
Mar	32° / 23°	64	9.3	12	4.1
Apr	31° / 23°	188	17.1	12.1	3.6
May	29° / 22°	386	27	12.2	3.2
Jun	29° / 22°	367	28.4	12.2	3.1
Jul	29° / 22°	363	28.9	12.2	3.2
Aug	30° / 22°	261	25.4	12.1	3.3
Sep	31° / 23°	157	18.8	12	3.5
Oct	32° / 23°	115	16.4	11.9	3.5
Nov	32° / 23°	114	15.6	11.8	3.5
Dec	31° / 23°	75	13.6	11.8	4.1

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 3% of the time in May, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 7% of May, with mostly cloudy or overcast conditions the remaining 90%.

	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 (%)	14	14	12	12	12	11	10	9	9	9	9	9	9	10	10	10	10	10	11	11	11	11	10	10	10	10	10	10	10	10	10
Cloudier (%)	86	86	88	88	88	89	90	91	91	91	91	91	91	90	90	90	90	90	89	89	89	89	90	90	90	90	90	90	90	90	90

	Clearer (%)	Cloudier (%)
1	14	86
2	14	86
3	12	88
4	12	88
5	12	88
6	11	89
7	10	90
8	9	91
9	9	91
10	9	91
11	9	91
12	9	91
13	9	91
14	10	90
15	10	90
16	10	90
17	10	90
18	10	90
19	11	89
20	11	89
21	11	89
22	11	89
23	10	90
24	10	90
25	10	90
26	10	90
27	10	90
28	10	90
29	10	90
30	10	90
31	10	90

Chance of precipitation in May

Any precipitation

Lethem gets around 386 mm of rain over 27 wet days in May, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 86% and peaks near 92% on the wettest days. The odds climb 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 (%)	76	77	78	79	81	82	83	84	85	86	87	87	87	87	87	87	87	87	88	88	88	88	89	89	89	90	90	91	91	92	92

	Rain chance (%)
1	76
2	77
3	78
4	79
5	81
6	82
7	83
8	84
9	85
10	86
11	87
12	87
13	87
14	87
15	87
16	87
17	87
18	87
19	88
20	88
21	88
22	88
23	89
24	89
25	89
26	90
27	90
28	91
29	91
30	92
31	92

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the oppressive band about 88% of days. Sticky, muggy-or-worse air turns up on roughly 100% 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
Muggy (%)	21	20	20	19	18	17	16	15	14	13	13	12	12	12	11	11	11	10	10	9	9	8	8	7	7	6	6	5	5	4	4
Oppressive (%)	79	80	80	81	82	83	84	85	86	87	87	88	88	88	89	89	89	90	90	91	91	92	92	93	93	94	94	95	95	96	96

	Muggy (%)	Oppressive (%)
1	21	79
2	20	80
3	20	80
4	19	81
5	18	82
6	17	83
7	16	84
8	15	85
9	14	86
10	13	87
11	13	87
12	12	88
13	12	88
14	12	88
15	11	89
16	11	89
17	11	89
18	10	90
19	10	90
20	9	91
21	9	91
22	8	92
23	8	92
24	7	93
25	7	93
26	6	94
27	6	94
28	5	95
29	5	95
30	4	96
31	4	96

Wind in May

Winds average 8 km/h in May.

Across May, daily wind ranges from about 7 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)	9	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	7	7	7	7	7	7	7	7	7	7	7	7	7	7
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	9	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	7	calm
19	7	calm
20	7	calm
21	7	calm
22	7	calm
23	7	calm
24	7	calm
25	7	calm
26	7	calm
27	7	calm
28	7	calm
29	7	calm
30	7	calm
31	7	calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 06 min at the start of May to 12 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over May. Sunrise moves from 5:53 AM to 5:51 AM, and sunset from 6:00 PM to 6:02 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)	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.2	12.2	12.2	12.2	12.2	12.2	12.2	12.2	12.2	12.2	12.2	12.2	12.2	12.2	12.2	12.2	12.2
Sunrise (AM)	5:53	5:53	5:52	5:52	5:52	5:52	5:52	5:52	5:52	5:51	5:51	5:51	5:51	5:51	5:51	5:51	5:51	5:51	5:51	5:51	5:51	5:51	5:51	5:51	5:51	5:51	5:51	5:51	5:51	5:51	5:51
Sunset (PM)	6:00	6:00	6:00	6:00	6:00	6:00	6:00	6:00	6:00	6:00	6:00	6:00	6:00	6:00	6:00	6:00	6:00	6:00	6:00	6:00	6:00	6:01	6:01	6:01	6:01	6:01	6:01	6:01	6:02	6:02	6:02

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.1	5:53	6:00
2	12.1	5:53	6:00
3	12.1	5:52	6:00
4	12.1	5:52	6:00
5	12.1	5:52	6:00
6	12.1	5:52	6:00
7	12.1	5:52	6:00
8	12.1	5:52	6:00
9	12.1	5:52	6:00
10	12.1	5:51	6:00
11	12.1	5:51	6:00
12	12.1	5:51	6:00
13	12.1	5:51	6:00
14	12.1	5:51	6:00
15	12.2	5:51	6:00
16	12.2	5:51	6:00
17	12.2	5:51	6:00
18	12.2	5:51	6:00
19	12.2	5:51	6:00
20	12.2	5:51	6:00
21	12.2	5:51	6:00
22	12.2	5:51	6:01
23	12.2	5:51	6:01
24	12.2	5:51	6:01
25	12.2	5:51	6:01
26	12.2	5:51	6:01
27	12.2	5:51	6:01
28	12.2	5:51	6:01
29	12.2	5:51	6:02
30	12.2	5:51	6:02
31	12.2	5:51	6:02

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 3.84 kWh/m².

For context, solar energy here swings from a low near 3.83 kWh/m² to a high of 5.74 kWh/m² in October across the year — May's 3.84 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)	4.2	4.1	4.1	4.0	4.0	4.0	3.9	3.9	3.9	3.9	3.8	3.8	3.8	3.8	3.8	3.8	3.8	3.8	3.8	3.8	3.8	3.8	3.8	3.8	3.8	3.8	3.8	3.8	3.8	3.8	3.8
Level	Bright	Bright	Bright	Bright	Bright	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	Solar energy (kWh/m²)	Level
1	4.2	Bright
2	4.1	Bright
3	4.1	Bright
4	4.0	Bright
5	4.0	Bright
6	4.0	Moderate
7	3.9	Moderate
8	3.9	Moderate
9	3.9	Moderate
10	3.9	Moderate
11	3.8	Moderate
12	3.8	Moderate
13	3.8	Moderate
14	3.8	Moderate
15	3.8	Moderate
16	3.8	Moderate
17	3.8	Moderate
18	3.8	Moderate
19	3.8	Moderate
20	3.8	Moderate
21	3.8	Moderate
22	3.8	Moderate
23	3.8	Moderate
24	3.8	Moderate
25	3.8	Moderate
26	3.8	Moderate
27	3.8	Moderate
28	3.8	Moderate
29	3.8	Moderate
30	3.8	Moderate
31	3.8	Moderate

Planning a trip in May

Hazard calendar for Lethem

In seasonPeak

In May, Lethem sits inside its monsoon season. The full year is below, with each hazard's peak months called out.

Lethem's monsoon runs April–August, when most of the year's rain falls.

Monsoon

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is May a good time to visit Lethem?

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

3.2

Sightseeing

10th-best month of the year

4.2

Beach & pool

10th-best month of the year

May is a weaker month for outdoor sightseeing in Lethem.

What to pack for Lethem in May

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

In May, Lethem sees daytime highs around 29°C and nights near 22°C. Pack light clothes and rain gear. About 27 days see rain.

light clothesrain gear

UV index in Lethem in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Lethem peaks around March 21 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 16 at about 11 (extreme).

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	14	15	15	13	12	11	12	12	12	11	11
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	14	Extreme
Feb	14	Extreme
Mar	15	Extreme
Apr	15	Extreme
May	13	Extreme
Jun	12	Extreme
Jul	11	Extreme
Aug	12	Extreme
Sep	12	Extreme
Oct	12	Extreme
Nov	11	Extreme
Dec	11	Extreme

Air quality in Lethem 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 Lethem is worst in April — around 20 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (August, 10 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)	15	18	20	20	14	12	11	10	11	12	12	13
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Good	Good	Good	Good	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	15	Moderate
Feb	18	Moderate
Mar	20	Moderate
Apr	20	Moderate
May	14	Moderate
Jun	12	Moderate
Jul	11	Good
Aug	10	Good
Sep	11	Good
Oct	12	Good
Nov	12	Moderate
Dec	13	Moderate

Location & terrain

Where is Lethem?

Lethem sits at 3.4°N, 59.8°W, 0 m above sea level, in Guyana. The nearest listed city is Boa Vista, 115 km away.

Topography around Lethem

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

Within 3 km, the terrain around Lethem has only modest variations in elevation — a maximum elevation change of 23 m around an average of 87 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 832 m; within 80 km, large variations in elevation — a maximum elevation change of 1,000 m.

The land around Lethem is covered by grassland (79%) within 3 km, grassland (85%) within 16 km, and grassland (68%) and trees (30%) within 80 km.

3 km

23 m

grassland 79%

16 km

832 m

grassland 85%

80 km

1,000 m

grassland 68%

treesshrubsgrasslandartificial surfacesbare terrainwaterwetland

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

May weather nearby: Boa Vista 115 km · Cantá 123 km · Mucajaí 161 km · Pacaraima 190 km · Alto Alegre 196 km · Santa Elena de Uairén 200 km · Caracaraí 227 km · Rorainópolis 278 km

Guyana travel facts

Travel advisory: Level 3; Reconsider Travel
Power plugs: Type A / B / D / G; 240 V · 60 Hz
Prices: ≈ 33% of US; price level, 2025
GDP per capita: $32,414; 2025
Happiness: 6.0 / 10; World Happiness, 2011
Safe drinking water: 67%; of population, 2024
Homicide rate: 19.1; per 100k, 2023
Road deaths: 22.3; per 100k/yr, 2019
Income group: High; World Bank
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 Lethem (3.3726°, -59.7997°, elevation 0 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	30	23
2	30	23
3	30	23
4	30	23
5	30	23
6	30	23
7	30	23
8	29	23
9	29	23
10	29	23
11	29	23
12	29	23
13	29	23
14	29	23
15	29	22
16	29	22
17	29	22
18	29	22
19	29	22
20	29	22
21	29	22
22	29	22
23	29	22
24	29	22
25	29	22
26	29	22
27	29	22
28	29	22
29	29	22
30	29	22
31	29	22

	Clearer (%)	Cloudier (%)
1	14	86
2	14	86
3	12	88
4	12	88
5	12	88
6	11	89
7	10	90
8	9	91
9	9	91
10	9	91
11	9	91
12	9	91
13	9	91
14	10	90
15	10	90
16	10	90
17	10	90
18	10	90
19	11	89
20	11	89
21	11	89
22	11	89
23	10	90
24	10	90
25	10	90
26	10	90
27	10	90
28	10	90
29	10	90
30	10	90
31	10	90

	Rain chance (%)
1	76
2	77
3	78
4	79
5	81
6	82
7	83
8	84
9	85
10	86
11	87
12	87
13	87
14	87
15	87
16	87
17	87
18	87
19	88
20	88
21	88
22	88
23	89
24	89
25	89
26	90
27	90
28	91
29	91
30	92
31	92

	Muggy (%)	Oppressive (%)
1	21	79
2	20	80
3	20	80
4	19	81
5	18	82
6	17	83
7	16	84
8	15	85
9	14	86
10	13	87
11	13	87
12	12	88
13	12	88
14	12	88
15	11	89
16	11	89
17	11	89
18	10	90
19	10	90
20	9	91
21	9	91
22	8	92
23	8	92
24	7	93
25	7	93
26	6	94
27	6	94
28	5	95
29	5	95
30	4	96
31	4	96

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

	Clearer (%)	Cloudier (%)
1	14	86
2	14	86
3	12	88
4	12	88
5	12	88
6	11	89
7	10	90
8	9	91
9	9	91
10	9	91
11	9	91
12	9	91
13	9	91
14	10	90
15	10	90
16	10	90
17	10	90
18	10	90
19	11	89
20	11	89
21	11	89
22	11	89
23	10	90
24	10	90
25	10	90
26	10	90
27	10	90
28	10	90
29	10	90
30	10	90
31	10	90

	Rain chance (%)
1	76
2	77
3	78
4	79
5	81
6	82
7	83
8	84
9	85
10	86
11	87
12	87
13	87
14	87
15	87
16	87
17	87
18	87
19	88
20	88
21	88
22	88
23	89
24	89
25	89
26	90
27	90
28	91
29	91
30	92
31	92

	Muggy (%)	Oppressive (%)
1	21	79
2	20	80
3	20	80
4	19	81
5	18	82
6	17	83
7	16	84
8	15	85
9	14	86
10	13	87
11	13	87
12	12	88
13	12	88
14	12	88
15	11	89
16	11	89
17	11	89
18	10	90
19	10	90
20	9	91
21	9	91
22	8	92
23	8	92
24	7	93
25	7	93
26	6	94
27	6	94
28	5	95
29	5	95
30	4	96
31	4	96

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

	Clearer (%)	Cloudier (%)
1	14	86
2	14	86
3	12	88
4	12	88
5	12	88
6	11	89
7	10	90
8	9	91
9	9	91
10	9	91
11	9	91
12	9	91
13	9	91
14	10	90
15	10	90
16	10	90
17	10	90
18	10	90
19	11	89
20	11	89
21	11	89
22	11	89
23	10	90
24	10	90
25	10	90
26	10	90
27	10	90
28	10	90
29	10	90
30	10	90
31	10	90

	Rain chance (%)
1	76
2	77
3	78
4	79
5	81
6	82
7	83
8	84
9	85
10	86
11	87
12	87
13	87
14	87
15	87
16	87
17	87
18	87
19	88
20	88
21	88
22	88
23	89
24	89
25	89
26	90
27	90
28	91
29	91
30	92
31	92

	Muggy (%)	Oppressive (%)
1	21	79
2	20	80
3	20	80
4	19	81
5	18	82
6	17	83
7	16	84
8	15	85
9	14	86
10	13	87
11	13	87
12	12	88
13	12	88
14	12	88
15	11	89
16	11	89
17	11	89
18	10	90
19	10	90
20	9	91
21	9	91
22	8	92
23	8	92
24	7	93
25	7	93
26	6	94
27	6	94
28	5	95
29	5	95
30	4	96
31	4	96