Bukit Mertajam Temperature by Month

The average annual maximum temperature in Bukit Mertajam, Penang, Malaysia is 33°C (91°F), with little variation between seasons. This page covers monthly averages, day-night differences, and how Bukit Mertajam compares to cities worldwide.

The climate in Bukit Mertajam remains fairly constant, offering very warm temperatures throughout the year. Maximum daytime temperatures reach a very warm 33°C (91°F) in March, dropping to a very warm 32°C (90°F) in October. Nighttime lows stay between 25°C (77°F) and 25°C (77°F).

The chart below illustrates the average maximum day and minimum night temperatures in Bukit Mertajam by month:

The coolest part of the day is typically between 4 AM and 6 AM, while 3 PM is usually the warmest, when solar heating is at its peak. March, the city's warmest month, averages 201 hours of sunshine.

The chart below shows the average temperature throughout the year:

Bukit Mertajam's average annual maximum temperature is 33°C (91°F). To put that in context, here's how it compares to a few well-known destinations:

Lisbon, Portugal averages 21°C (70°F) annually, warm summers, mild winters, and rain mainly in the cooler months.

On the cooler end, Oslo, Norway averages just 10°C (50°F) annually, with pleasant summers but long, cold winters.

San Francisco, USA averages 19°C (66°F) annually, but with little seasonal variation, summers are often cool and foggy, winters mild.

Melbourne, Australia averages 20°C (68°F) annually, known for unpredictable weather, with four seasons sometimes happening in one day.

Temperature alone doesn't tell the whole story, humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.

In Bukit Mertajam, October is the coolest month, with average highs of 32°C (90°F) and humidity around 87%, considered very high. In March, the warmest month, temperatures average 33°C (91°F) with 81% humidity, conditions that feel very high. For a full picture, see our humidity page.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained, so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.

For more on Bukit Mertajam's weather, including monthly rainfall, sunshine hours, and humidity, visit our Bukit Mertajam climate page.