Nampa (ID) Temperatures: Monthly Averages and Year-Round Insights

On this page, we’ll explore Nampa’s temperature statistics in detail, including day and night variations and monthly averages. We’ll also compare the annual temperature to other cities in the United States of America.

Monthly Temperature Averages

Depending on the time of the year, temperatures range from very warm to cold in Nampa. Average maximum daytime temperatures range from a very warm 34°C in July, the warmest time of the year, to a chilly 3°C during cooler months like January. At night, minimum temperatures typically average around -5°C during these months.

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

The minimum temperature is often recorded between 4 AM and 6 AM, while the highest temperature is usually reached at 3 PM. During this time the sun's heating effect is the strongest. July, the city’s warmest month receives 399 hours of sunshine.

The chart below shows the average temperature throughout the year:

January, the city’s coldest month, receives about 25 mm of snow/rainfall spread over roughly 9 days. For more information, please visit our Nampa Precipitation page.

Annual Temperatures in the United States of America Compared

The map below shows the annual temperature across the United States of America. You can also select the different months in case you are interested in a specific month.

Annual

Annual

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Legend

very warm

warm

pleasant

moderate

cold

very cold

Very warm means maximum temperatures above 30°C. Warm: 22°C to 30°C. Pleasant: 18°C to 22°C Moderate: 12°C to 18°C. Cold: 2°C to 12°C. Very cold: lower than 2°C

Nampa Temperatures Compared World Wide

Nampa’s average annual maximum temperature is 18°C. Let’s compare this with some popular tourist destinations:

In Lisbon, Portugal, the average annual temperature is 21°C, offering warm summers and mild, rainy winters.

In Toronto, Canada, the average annual temperature is 13°C, with snowy winters and warm summers.

Beijing, China, experiences more extreme temperature shifts, but still averaging 20°C annually.

In Brisbane, Australia, the average annual temperature is 26°C, making it warmer than Sydney.

How does the temperature feel?

Humidity is an essential factor in how you experience temperature. When a warm period is accompanied by high humidity, it results in a higher perceived temperature. This is especially true when temperatures exceed 25°C, as it can cause greater discomfort.

On the other hand, in cooler months, especially when temperatures dip below 10°C, high humidity can intensify the cold. This makes the air feel much colder than it really is.

In Nampa, during the coolest month, January, you will experience 75% humidity, which is considered high. This is accompanied by an average maximum temperature of 3°C. In the warmest month, July, the humidity is 36% combined with an average maximum temperature of 34°C, which creates a low-feel temperature. Explore our detailed page on humidity levels for further details.

How are these Temperatures Measured?

Generally, temperature data depicting climate is usually given over a 30-year average in order to reduce short-term fluctuations and reveal better long-term trends in climate conditions.

This temperature data is taken from land-based thermometers, ocean buoys, ships, and satellites. These measurements are transmitted to weather stations and climate centers around the globe where they are processed, averaged, and analyzed in order to monitor the trends and create climate models.