Sun on a roof in Alton.

How Alton comparesderived from the figures above

Where Alton sits.

Alton ranks 19th of 157 Texas places modeled here, at the 89th percentile. Its 1,570 kWh per kW is above the Texas median of 1,518. The strongest months are August, July, June and the weakest are January, December, November; output peaks in August and bottoms out in January. In all, 29.0% of the year arrives in June, July and August, less than the 29.4% of the median place.

Closest modeled neighbors

• McAllen, 10 km southeast: 1,575 kWh per kW, 5 more than Alton.
• Mission, 10 km south: 1,598 kWh per kW, 28 more than Alton.
• Edinburg, 16 km east: 1,575 kWh per kW, 5 more than Alton.
• Pharr, 19 km southeast: 1,547 kWh per kW, 23 less than Alton.
• San Juan, 19 km southeast: 1,557 kWh per kW, 13 less than Alton.
• Alamo, 23 km southeast: 1,540 kWh per kW, 30 less than Alton.
• Weslaco, 35 km southeast: 1,540 kWh per kW, 30 less than Alton.
• Harlingen, 62 km east: 1,530 kWh per kW, 40 less than Alton.
• San Benito, 69 km east: 1,532 kWh per kW, 38 less than Alton.

Against San Antonio

The nearest of the six largest modeled places is San Antonio, 353 km to the north, at 1,505 kWh per kW. Alton models 65 kWh per kW (4.3%) above it. Alton lies 3.17 degrees of latitude south of San Antonio, and the sun stands higher in the sky the further south you go, which matches its higher modeled output. The weather station for Alton is 1.0 km from the modeled point, against 2.2 km for San Antonio, so part of the gap can come from which station's typical year was used.

The second-nearest large place is Austin, 449 km north, where the same model gives 1,483 kWh per kW, so Alton runs 87 above that figure. Against the Texas median place month by month, Alton runs at least 2% higher in February, March, April, May, June, August, October, December. It runs at least 2% lower in September.

Electricity in Hidalgo CountyEIA-861

Electricity prices nearby

EIA lists Oncor Electric Delivery and AEP Texas Central in this county. Where Alton is on Oncor Electric Delivery and AEP Texas Central's lines, homes buy energy from a retail electricity provider and the price depends on the plan. Parts of Alton may instead be served by a co-op or utility listed below, which sets its own rates; check your bill. For scale only, the median 2025 average price across the 60 Texas retail providers on this site is 15.32¢ per kWh, which would put the modeled 1,570 kWh at $241 per kW a year, plain multiplication and not a savings estimate or an offer.

Also listed in the county

• Magic Valley Electric Coop Inc: 10.51¢ per kWh, a bundled average, 129,596 residential customers across 6 counties.
• Oncor Electric Delivery Company LLC: 5.64¢ per kWh, delivery charges only, before the retail energy price, 3,545,814 residential customers across 99 counties.

These utilities serve other parts of the county, which can include parts of Alton. They are the largest bundled providers, and the largest delivery-only one, whose EIA service territory lists the county. A county can list several, and which one serves a street depends on the address, so check your bill.

Modeled estimateruns in your browser

Size the array, see the kWh.

Scale the Alton model to another array size, take off extra losses for shade or dirt, and price the energy at any rate. It is arithmetic on the PVWatts output above, nothing more: not a quote, not a savings estimate and not advice.

Starting rate: the Texas residential average of 15.47¢ per kWh. At that rate the modeled output is worth $243 per kW a year as plain multiplication.