Lethem in Winter
In winter (December, January and February), Lethem sees average daytime highs around 31°C and overnight lows near 23°C, with 168 mm of rain over about 31 wet days across the season. It is the 2nd-warmest season and the driest season of the year.
Across winter, daytime highs hold fairly steady around 31°C. The sky is clear or mostly clear about 10% of the time across winter, and the air most often feels muggy.
Winter is Lethem's best season of the year to visit on our travel score. For the whole year in context, see Lethem's year-round climate.
- Avg daytime high
- 31°C
- 2nd-warmest season
- Avg overnight low
- 23°C
- Rainfall
- 168 mm
- 31 wet days
- Avg wind
- 13 km/h
- Travel score
- 4.4
- best season of the year
- Months
- Dec · Jan · Feb
Temperature in Lethem in Winter
Across winter, daytime highs hold fairly steady around 31°C.
A typical winter day in Lethem reaches about 31°C and drops to 23°C overnight. The warmest of the three months is December, the coolest January.
How winter really feels in Lethem
Once humidity and wind are folded in, winter brings about 90 days that feel above 32°C and 0 that feel at or below 0°C.
The story in winter is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Lethem weather by month
How the three winter months (December, January and February) compare with the rest of the year — the season's months are highlighted.
| 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 Winter
The sky is clear or mostly clear about 10% of the time across winter.
Chance of precipitation in Winter
Lethem gets around 168 mm of rain over 31 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 13 km/h across winter.
Sunrise & sunset in Winter
Daylight runs from about 11 h 48 min in early December to 11 h 54 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Winter
Average shortwave solar energy reaching the ground each day across winter, about 5.0 kWh/m².
Hazard calendar for Lethem
None of Lethem's seasonal hazards peak in winter. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do.
Lethem's monsoon runs April–August, when most of the year's rain falls.
Is winter a good time to visit Lethem?
Our two travel scores rate winter for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
winter is a reasonable time to visit Lethem for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Lethem in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, Lethem sees daytime highs around 31°C and nights near 23°C. Pack light clothes. Worth having: rain gear and sun protection. About 31 days see rain.
UV index in Lethem in Winter
Clear-sky midday UV across winter averages 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 Winter
Average fine-particle pollution (PM2.5) through the year — so you can see where winter 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 |
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.
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.