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.
Bukit Mertajam Monthly Temperatures
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 January. 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:
Temperature: Bukit Mertajam vs Malaysia
The map below shows the annual temperature across Malaysia. You can also select individual months if you want to compare a specific time of year.
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Bukit Mertajam vs World: Temperature Compared
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.
What Does the Temperature Feel Like in Bukit Mertajam?
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, January is the coolest month, with average highs of 33°C (91°F) and humidity around 75% — considered 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.
