July weather forecastJoanna, Guyana

Weather in July

July, like June, in Joanna, Guyana, is a moderately hot summer month, with an average temperature ranging between min 24.8°C (76.6°F) and max 29.4°C (84.9°F).

Temperature

The onset of July brings an average high-temperature of a still warm 29.4°C (84.9°F), nearly matching the June temperature. Joanna's nocturnal July readings average at a still moderately hot 24.8°C (76.6°F), showing little variation from the daytime temperatures.

Heat index

The average heat index in July is computed to be a very hot 36°C (96.8°F). Ensure heightened precautions, risk of heat cramps and heat exhaustion is significant. Sustained activity could provoke heatstroke.
Data suggests that the heat index is set for environments in shade and with a light wind. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'feels like' or 'real feel', arises from combining readings of air temperature and relative moisture content. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.
Humans rely on perspiration as a cooling mechanism, wherein the evaporating sweat counteracts excessive warmth. When there is an excess of moisture in the atmosphere, the efficiency of the evaporation process is lessened, leading to less efficient body cooling and a sensation of overheating. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

The average relative humidity in July is 81%.

Rainfall

In Joanna, in July, during 29.9 rainfall days, 301mm (11.85") of precipitation is typically accumulated. In Joanna, during the entire year, the rain falls for 312.6 days and collects up to 2298mm (90.47") of precipitation.

Daylight

In July, the average length of the day is 12h and 26min.
On the first day of the month, sunrise is at 05:39 and sunset at 18:07. On the last day of July, in Joanna, sunrise is at 05:43 and sunset at 18:06 -04.

Sunshine

In Joanna, the average sunshine in July is 8.3h.

UV index

January, February, April, June through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: The daily high UV index of 7 in July translates into this advice:
Take precautions against overexposure. Protection against sun damage is needed. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.