Temperature
Environmental Indicators:
Societal Indicators:
Disclaimer: This tool is best viewed in Chrome, Firefox, Microsoft Edge, and Safari browsers. It does not work with Internet Explorer.
The initial map shows the annual change in average temperature by climate division from 1900 to 2024.
Each of the above highlighted attributes can be changed in the grey sidebar to the left of the map. Click the Update Map button to refresh the map based on your selections.
Click a location on the map and scroll down to see how temperature changes over time at that location. Click on the tabs to view trends and additional information. Click on the magnifying glass icon on the right side of the map to search for a location.
Temperature over time (Left Graph) displays temperature over time based on map selections. The dashed line is the median temperature from 1900–1970.
All temperatures over time (Right Graph) displays the monthly, seasonal, or annual temperature at the selected location.
Temperature relative to 1900–1970 (Left Graph) displays the difference in temperature relative to the median temperature from 1900–1970 at the selected location.
Is there a trend in temperature over time? (Right Graph) displays the trend analysis (Mann Kendall and Sen Slope) at the selected location. Selecting All Trends from Selected Start Year shows trends from start year through each following decade.
Over which time periods were there significant trends? displays the slope (warmer is positive and colder is negative) and p-value (significance) for different time periods with 30+ years of data. This shows how consistent changes in temperature have been over time and helps compensate for when a time period began or ended during an extreme heat or cold wave. Highlighted cells are for the selected start year (row).
Slope (℉/yr):
| Slope ≥ 0.01 | -0.01 < Slope < 0.01 | Slope ≤ -0.01 |
P-value:
| Pval > 0.10 | 0.05 < Pval ≤ 0.10 | Pval ≤ 0.05 |
Temperature impacts the earth's water cycle through evaporation and precipitation type (such as snow or rain), location, and intensity. In a warming climate, precipitation events are predicted to become more intense. While the same amount of rain may fall, it may come in short, concentrated bursts followed by long periods of dry conditions. In areas where streams are predominantly driven by snow-pack, warmer temperatures may cause more precipitation to fall as rain instead of snow. This impacts the timing of runoff and the volume of water available during summer months. Warmer temperatures also impact water quality.