To determine how much rain has fallen in the previous 24 hours, you’ll need to regularly check it every 24 hours! Read the gauge by looking at the waterline straight on, at eye level.  The water line's surface will be curved; this is the meniscus, formed as the water comes in contact with the container and creates surface tension.  Your reading needs to be from the bottom of the curve. It’s important to check it every day even if there hasn’t been any rain. You can lose water from evaporation, and water mysteriously showing up in your rain gauge without the accompanying rain clouds might mean your rain gauge needs a new spot (sprinklers are a common culprit). For example, you could make a 7 x 7 chart, marking the days of the week along the x-axis and 1 to 7 inches (2.5 to 17.8 cm) along the y-axis. After filling in a dot at each appropriate intersection of rainfall (in inches) and the day of the week, you can use a ruler to connect the dots and see the fluctuations in the rain measurement for that week. After each recording, you’ll want to empty the rain gauge to ensure an accurate reading. Ensure you keep the same stones in your gauge, and refill water up to the zero on your scale. If you ever add or subtract stones from your gauge, ensure the water is again filled to the zero point before setting your rain gauge back in place. Once you’ve recorded data for a month, you can analyze your data and see overall rainfall trends. Adding up the rainwater of all 7 days in a week, then dividing it by 7, will give you the average rainfall of that week. Over a longer period of time, you could do this for months (or even years, if you’re particularly dedicated). The formula for finding an average is easy to apply. The average equals the sum of all the items (in this case, rainfall measurements for a day, week, or month) divided by the number of items (however many days, weeks, or months you’ve added up). If you're looking for average weekly rainfall over 4 weeks, with recorded weekly rainfall totals of 20 inches, 12...

How would you rephrase that briefly using Indonesian?
Periksa alat penakar hujan setiap hari. Tandai jumlah curah hujan pada grafik atau bagan. Kosongkan alat penakar hujan. Hitunglah nilai rata-rata.