Water Year Woes: Rainfall Plummets by 36% – What It Means for Our Future
As the current water year progresses, the precipitation levels across Iran have shown a significant decline. According to the latest data from the Meteorological Organization, the rainfall from September 23, 2024, to March 14, 2025, has reached only 96.6 mm, which is a substantial 36% decrease compared to the 152.4 mm recorded during the same period last year.
In the past week alone, from March 8 to 14, Iran received approximately 6.4 mm of rainfall. This marks a considerable 22.8% decline from the long-term average of 8.3 mm, highlighting a worrying trend in precipitation levels.
Further analysis from February 19 to March 14 indicates that only 22.9 mm of rainfall was recorded, reflecting a 4% decrease compared to the long-term average of 23.9 mm. When looking at the overall winter season up to March 14, the cumulative rainfall stood at 62.7 mm, which translates to a 32.8% drop from the normal amount of 93.3 mm.
Interestingly, Mazandaran province is the sole region that has surpassed its long-term average rainfall, experiencing an increase of 3.7 mm. In contrast, most other provinces have seen below-normal precipitation levels. Notably, Hormozgan province recorded the most significant deficit, with rainfall measuring 71.2% less than the normal levels.
Tehran province is also facing challenges with low rainfall, having recorded an average of 98.5 mm in the current water year. This marks a 39.9% decrease from the long-term average of 163.8 mm.
Future Precipitation Forecasts
The Meteorological Organization has provided insights into the expected rainfall trends for the coming weeks. Here are the key forecasts:
- March 10 to April 4: Average rainfall is anticipated to be less than normal.
- April 5 to 20: Rainfall is expected to return to normal levels.
- March 17 to 24: Most regions will experience below-normal precipitation, while some areas in the northwest and west may see normal levels.
Temperature forecasts indicate that:
- In the northern half of the country, temperatures will range from 3 to 6 °C above normal.
- Regions in the northwest strip may exceed temperatures of 6 °C.
- Other areas will experience temperatures less than 3 °C.
Looking ahead, the average rainfall is projected to remain below normal next week. However, the Caspian coastal strip is expected to maintain normal temperatures. In the northern half, temperatures are forecasted to be between 3 to 5 °C above normal, while other regions will see temperatures approximately 1 to 3 °C above normal.
From March 30 to April 5, precipitation is expected to be normal, with a tendency towards below-normal levels. The average temperature will likely remain normal along the Caspian coast and 1 to 3 °C above normal in other regions.
As we transition into the period from April 5 to 20, rainfall is expected to be normal to above normal. Temperatures in the northern half of the country will be about 1 to 3 °C above normal from April 5 to 12, with other areas showing a 1 °C increase. By April 13 to 20, temperatures in most regions are expected to normalize.
This ongoing trend in precipitation and temperature fluctuations underscores the necessity for continued monitoring and adaptive strategies to mitigate potential impacts on agriculture and water resources across the country. As the situation evolves, staying informed will be crucial for both residents and policymakers alike.
